On a boat that old, it is hardly considered worthwhile to get someone else to do it since it is labor intensive work. You will be doing it for yourself to continue using the boat safely for a long time to come.
If you are not in a hurry and have some time, the bulk of the work is readily do-able for a DIYer at a huge savings. You buy your glass supplies over the one-shop sources over the internet at considerable savings, and marine plywood is available locally, if you choose to use marine plywood, which is the lowest cost option.
I used Raka in Florida for my fb supplies, there are others.
The remaining finish work is minor in $$, if you are so concerned with making it look like it was not done, then hire out the finish fairing work, much the same as guys do with sheetrock hiring out the taping.
Like Brian refers, go over to Classicmako.com and go through the project boats - show and tells, look at Eddie Rings boat project and others, you have everything there and narrated too. What a resource. No difference a Mako transom from a Grady transom, it's all wood and glass. When you get done, it will be better than new.
West Systems Epoxy sells a $5.00 starter booklet on fb boat repairs, read it.
Then come back here or at classicmako.com and ask questions.
Good luck
