Muse, have you thought of going to the hardware store with the image? I mean, those things are standardized, it's gotta exist in some other form in the US.
Yesterday I did an errand run. After everything else was taken care of I stopped at the
most stocked hardware store I know of, it's the size of a small warehouse. It's been there for at least 45 years, probably longer. I'd brought the bottom of my VeV moka coffee maker and my spare valve (non-working) as well. They didn't have the part. The manager said my valves had weakened due to all the steam, the spring that forces the ball against the closure hole was no longer capable of keeping sufficient pressure inside the machine to force the coffee up into the upper chamber, at least enough for a full pot of coffee.
I was directed to an upper crust culinary importer/retailer and they didn't have the valve either. They suggested I try a specialty coffee place (brew and equipment) a couple of blocks away. They didn't deal in moka pots any longer.
I then played my last card, which was to try the largest thrift store I know of, a giant recycling center, about the size of 1/2 a city block. I'd tried a couple of smaller thrift stores a few days ago, to no avail. They had an aluminum moka pot whose valve fits mine (I'd brought a Crescent wrench!). I paid the $6 for the pot, brought it home and made about 4 batches of coffee (later and this morning). The maximum output was about 11 ounces. I deliberated whether to keep using it or transfer the valve to my trusty stainless VeV, which can produce up to 13 ounces. The aluminum pot says Made in Italy, Junior Express, Crusinallo, and looks very nearly new. To me it appears that it was probably used not more than a few hundred times, probably less. It's in excellent shape. However, the last brew I made with it, I couldn't prevent it from spilling a bit of coffee on my stove when pouring into my favorite cup. That decided it. I removed its valve and screwed it into my VeV stainless, which I just used to make 13 ounces of brew. If I treat the thing well, it may make me another 40,000 brews if I live that long!
I'm going to try to be careful never to put the maker on high heat and forget it, which is what blew out the other two valves I have. Putting it on high heat is OK but once the coffee is rushing into the upper chamber it's wise to reduce the flame to low, quite low, really for the rest of the brewing process.
Now, people say that stainless steel moka pots after a time get stained, and it's true. Especially if you forget and leave the heat on high, the exterior darkens, scorches, and it no longer has that wonderful mirror gleam of the new pot. It IS possible to restore the original appearance (I've fought this "problem" for years, tried many many things). The only thing that really works for me, and I did this a few days ago, is to use wet-dry (black) sandpapers. These sandpapers can and usually should be used wet. I start with a very coarse grade, either 150 or 180 grit and work my way all the way up to extremely fine grits:
(150)
180
220
320
400
500
600
1200
1500
By the time you've used the 1500, the machine looks virtually brand new!
Before each usage, I wash the exterior with a
soft kitchen-spongy netted dish cleaning implement with some soap and water (and rinse). This really helps to keep the maker looking great.