Honestly, if you want an IR camera, I would go to a homebrew camera. You will get great pics, normally fast trigger times and a lot cheaper. If you do not want to make your own, there are many people that will make them, then sell them to make more, they come up for sale all the time at a reasonable price (some are not, but most are reasonable).

Go to Hagshouse.com to look in the homebrew forum slaes section and see what I mean.

Good luck.