FWIW, I've been getting ½" Dubias from
Reptile Deli. (Looks like their site may be going through some updating). They were at a couple of the shows we went to. Shipping has been prompt, well-packed, insulated, and packed with a heat pack (for the cold weather). This last time I ordered/got 1000 ($95 + $9 flat-rate). They come in a burlap bag, so I empty them into a bin and reorganize into smaller containers. Once we get a second mouth to feed, we'll probably look into breeding our own.
A while ago, I ordered 500 BSFL from SYMTON; that didn't go too well. Service was slow, and about 75% arrived black, dead, and/or pupated. They weren't moving at any rate, so they didn't spark ZaRDoZ' feeding response. We did contact them, and they did--eventually--send a replacement order (which was satisfactory--all white, live & kickin') but their response time was so slow that by the time the replacements arrived, ZaRDoZ had grown to the point of eating twice as many per meal, and I had already bought some various feeders at a local pet store. While SYMTON made things good
eventually, I don't think we'll be patronizing them again.
Still looking for a good source for Superworms. I held off at first because I read someplace that ZaRDoZ was too young for them(?) But I got some locally while waiting for SYMTON, and he had no problems eating them at all--in fact he
loves 'em! He also likes the giant meal worms (allegedly they don't pupate?) we got for him to try.