I admire your tenacity. I need a little more info, though:
1) does your son only have dyslexia or are there other LD's, ie dyscalculia?
2) does your son have any decoding/reading abilities at this time?
3) what program did the intensive university tutoring program use?
4) when did he last receive tutoring/instruction directly related to his reading disability?
5) what part of US do you live in - resources vary.
6) what are your son's interests - you mention he's bright - how do you see this manifested?
7) how was the CAPD diagnosed?
8) is he only unable to distinguish vowel sounds or does this difficulty also include consonants?
I will tell you that there are other phonemic awareness programs out there that use the same principle as the one you suggested.