Just because you have CFI after your cert and you made some power points doesn't mean you actually can handle your stuff mountain flying, or have enough experience doing it to have survived and learned from the lessons only time actually doing real mountain flying can teach
This is just like the retired airline guys who start aerobatic or mountain flying courses and use their 35,000hrs in the flight levels in a wide body to boast their experience.
Frankly unless you're trying to combine this with a BFR or need more dual hours, you don't NEED a CFI, just look for someone, CFI or not, who flys in real mountains (not waaaay over them), I'd take a Alaska freight dog, or a guy flying a super cub through the cascades, or even better go do some ridge flying glider guy, over many of these "mountain courses"
Actually I'd probably go with CC (right next to CA actually) over most of those mountain courses, dude has been around real backcountry flying and has a master from the school of hard knocks.
http://bush-air.com/school.htm