There are ways to improve Cosmos cooling, but I've not heard of front fans being one of them... You're supposed to be able to get a free fan bracket for the top of your HDD rack (pulls air thru the HDD racks) if your case didn't come with one, but as you said, getting in contact with Cooler-Master, especially around the holidays, can be a case-study in frustration. There was a notice about the free fan bracket offer on the Cosmos page at the C-M site. I don't think there are any places to mount fans on the front panel at all. You can cut your own hole to mount another fan on the bottom, but that's about it. Front fans would be blowing against the broad sides of the HDDs so wouldn't be very useful even if you could mount one or more...
.bh.