I bought mine from a company on ebay called Yoozinha (or similar) for less than $10. And it works just fine for me (I have a LVD 80 host adapter and LVD 80 and 160 drives). Just make sure whatever one you buy is rated for the drive/adapter combo you have as LVD drives/adapters require LVD certified 80 to 68 pin adapters.
. Here are some other good SCSI resources you might want to check out:
hypermicro.com (may offer free ground shipping if you mention
www.storagereview.com - check the SR site for the latest offer)
centrix-intl.com
pc-pitstop.com (offers PayPal as a payment option)
scsi4me.com (ditto)
and I can usually find stuff for low bucks on eBay.
.bh.