Photographer, Curator of Entomology at The University of Texas
I've been getting unit trays here: https://www.hhelementsinc.com/shop Pins and pens and such from Amazon; I've yet to find a decent net vendor and I hope I don't run out of ethyl acetate any time soon.
Our last (big) order of drawers & unit trays came from HH Elements, but there were serious quality issues with everything. I've chalked it up to labor & supply issues affecting manufacturers during the pandemic (but I REALLY wish there were more options). Our director (Dan Young) has been more impacted since he teaches all of the taxonomy courses in the department. I know he was looking for a new source of cardboard pinning boxes; I'll check with him to see if he found one.
I got my personal things from : https://www.atelierjeanpaquet.com/en/ But the people here at Arthropod Monitoring are still thinking where to buy. At least this year they made big buys so we are fine at the moment