@Vince1: OK, I found some possible substitutes. Are any of these usable?
wanted: Triton X100, have: PPI N-95
wanted: NP-40, have: NP-4
wanted: Tergitol 15-S-7, have Tergitol15-S-3
From previous posts it looks like the Tergitol 15-S-3 is usable, however I am unsure of the others.
Thanks