Bomex Version 2, IIRC.
Version one had a two hole lip:
http://www.mk3.us/steve/Miscpics/Supra-Bomex.jpg
As for where to get the full kit, I don't know. I don't know if they're still available from Bomex, but there are replicas available from time to time. If you get a replica, make sure the material it's made from is flexible.