Best place I have found is www.dubiaroaches.com I have ordered from other places and found I like this place the best - others on here can say where they are getting theirs as well
Karrie
I've come across this article today Breeding Dubia Roach Colony about breeding dubia roach colony and they also recommend dubiaroaches.com so +1 to Karrie.
I've been using Reptile Deli. Very satisfied.
They're geographically closest to us, so it's fast & no ded bugz [sic].
Lately been ordering 1000 ½" dubias at a time; this time we added 500 Lg. supers.