That's right, no temp correction tables exist for hot weather and you don't see a hot temp limit on RNAV approach plates as you see a cold temp limit (usually around -10C) - presumably because it's on the safe (high) side.
However I believe the correction numbers are the same for ISA plus as they are for ISA minus, but with a sign change. Perhaps someone with an intimate knowledge of altimeter calibration could comment.
Thus, I would go along with FD's method of flying the approach from 1900 (or 3000 if you wish) but bearing in mind that you are probably starting out 300' high which you have 5nm to get rid of so you will need appx 400'/nm ie nearly 4 degrees FPA.
If you don't do something about it pretty quickly as you descend, you're going to have trouble with the stable approach criteria.
Lets hope we hear from some desert pilots soon and, when I get a chance, I'll have a go in the sim to see what happens.