I manufacture the mosfets that spazz installs (one of the ones he carries at least), if you need one supplied to you I can get you one. Just sold my 600th unit earlier this month.
I don't do installation, however there are good people out there in your area if you don't feel confident with gearbox work and/or basic soldering. I'm in east mesa, but I am in the dobson /southern area every day.