I’m going to have to check this out tomorrow...
Olympus C2020s go pretty cheap on eBay, despite their reputation as *the* IR digicam.
Less than $50 will net you a decent one.
The expense is buying the old SmartMedia cards and a card reader.
All you really need is a 72 [720nm] filter.
The 25 is really *too* red unless you’re aiming for B/W results.