They may not do it in a lab but I wouldn't rule out SIAL for possible production. They may want an "exclusive" marketing agreement especially for the higher margin Gen 2-5 products; so Gen 1 goes with that.
The security of the worms IMHonestO is a point to consider and the producing manufacturer/ textile firm IMHO would need to gurantee that security 110%. For Gen 1 they wouldn't be making the products , i think they would only be supplying the thread to potential raw silk manufacturers.
Gen2-?? would need very high level security.Look at the history of the silk industry, people were searched at the Chinese border crossings, old men with hollowed out walking sticks smuggling silkworm larvae into the middle east.
I beleive SIAL could provide that security, so you could have a lab doing the silkworm alterations and then a production area for product. think of it similar to a cardboard box co, a small room for design, testing, customer analysis -order placed - and off to production.
As it appears this tech could revolutionalize "much" and SIAL may want to play a leading role in this top end technology.
PedroMon