the fiberglass part is the easiest part of the whole thing
check out my build thread for pics of my foothold install on my 07' --> it was my first time too...
When I started thinking about it- I was asking the same thing--> is there anyone in my area that can do this???? Because I did not want to mess up my ski... I will tell you this much--> do some research, buy good parts/material, take your time, drink a few beers -->and it will turn out exactly the way you wanted.
I will turn you onto a good supplier for all your fiberglass materials for the footholds and reinforcing--> US Composites - look them up on yahoo - you can order all your stuff online....
Use the epoxy mixed with cabosil to glue them in - and use the screw method to clamp the suckers down while your epoxy mix dries really good- then take those screws out and finish her up.
If I were to do things over again- I would still get my footholds from Steve at the Watercraft Factory.
Sorry for the really long post- but I am really confident that this is something that you will not regret doing yourself... it is kinda satisfying knowing you did it yourself IMO