Mike, most of those stores are either "out of stock" or "on back order." I doubt that they will be receiving any more 3500's.
I have located one store in California--Computer3G--that is offering "NCM-ND-3500's" in beige, black or silver. The description states that they are "NEC-Mitsubishi" products. The only NEC-Mitsubishi products I can find are monitors.
I have placed a call to Computer3G. I must be mistaken that the company is in California, though, because the lady I asked to speak with (got her name on the Reseller Ratings website) is at "lunch." Who eats lunch at 10:00 a.m.?
I will let you know if this company actually has the 3500's. The price is $78, no software included, and includes free shipping. Their ratings are either very satisfied or very dissatisfied--no middle ground--and if you receive a DOA product, you are directed to the manufacturer to resolve the problem.
I am somewhat suspicious about the "silver" item, however, because NEC says that the drive is available in black or beige only. On the other hand, they are making 3520's in silver. I know, because I got one that I am returning. Maybe they slapped a silver bezel on some of the later 3500's? Maybe I will call NEC to verify.