So many people have left that I still remember very fondly. :\ And yes, H&V too. That archive loss was a painful one.

Geewhiz is the owner of the exchange collection on AO3 and I know she stopped being involved in fandom years ago. Maybe if you get in touch with her somehow, the collection could be transferred and a "add your old stuff!" notice from a new owner would be viable. (I think all of mine from that exchange are there, but I was an early-adopter for AO3. XD )