Update 3/18/23: a new business has started up and is slowly building their inventory. Keep an eye on EcologySupplies.com!
BioQuip announced last week that they are closing the business on March 11, due to a "perfect storm" of several reasons. They have been the primary supplier of insect collecting and rearing supplies to universities, museums and private researchers in the USA since 1947. I've been a happy customer for going on 20 years. Ever since I heard the announcement, I have been researching numerous websites for alternative sources of the supplies I've relied on from BioQuip over the years. A permanent page link can be found on the left side of my blog: Insect Collecting & Rearing Supplies
Some items are easy to find elsewhere but less convenient because of having to purchase from multiple sources. Other items are either difficult to find or you have to figure out an alternative name to search for, as some items marketed for butterfly collecting have other names in the craft stores or chemical supply companies.
If any of you are able to purchase from these places and feel like sharing your experience please send me an email (contact at left). I will try to keep the page updated with the best places to purchase supplies and any tips that I can come up with.