Trick to finding silkworms in stock?

Hi ,
I have been trying for months to get out of having to buy crickets. I have a starter colony of dubia that has been making babies finally, they are just a little small 1/2 inch, and I don't want to feed too many off right away and jack up the colony production...So, I was going to supplement with silkworms and feed some of the dubia as well. Problem is I've been searching for a couple days and no place, and I checked about 7 websites, actually has any in stock. I've got a 18.5" girl 8-10 month old and I want to stick with high protein feeders. Any alternatives? I also considered BSFL, I'm just concerned she'll plow thru them quick. I'd like to order a month supply, a few thousand, but also read they only last for a couple weeks before cocooning up. ): Just frustrated and don't know what to do. Where do y'all get silkworms that are actually in stock? Does anyone have luck ordering a few thousand BSFL to last about a month? (I don't want to be making multiple trips to pick up multiple orders per month bc I have had a lot of problems with my local post office loosing my insect packages, 2 times out of 2 orders).

Have you tried www.reptilianarts.com? Coastalsilkworms.com? I just checked reptilianarts and they have the cupped in stock along w/ the bulk--- you will need to buy food for the bulk
coastalsilkworms has two locations west coast and east coast

Thanks. I did not come across reptilianarts in my searches before. I appreciate it!