Silkworms are are the holy grail of feeders. They are one of the best feeders yet they are almost never available. I know mulberry farms offers them periodically but I’ve heard secondhand that there have been legal changes in their status hence the infrequency of availability. Check the chameleon forums for some breeding tips. This link may be helpful as a tutorial. I’ve also read that they pupate best at a perfect 77 degrees https://www.clubfauna.com/articles/invertebrates/breeding-silkworms./