Well, Muddy played a Tele and so did a lot of country players. I'd say try to find an old Tele that's still sound but doesn't look as good as it might then have someone rebuild the electronics putting a humbucker at the neck position. Mine is very much like that and I love it.Mine isn't a natural born Tele really, it was assembled by a local builder from high quality parts purchased through a catalog. As a result, mine is "releived" on the back after the fashion of a Strat. Feels good to hold.
Another option worth trying out before you decide is to get a D'Armond pickup (an old one if possible) and try it out on your accoustic. A lot of great players, including Brownie McGhee, used one to great advantage.
If you'll consider having someone rebuild or customize the electronics you'll have a huge number of options. The thing is to play a lot of good and bad guitars before making a choice. The differences will quickly become apparant.
Don't forget to keep checking the pawn shops. If you know how to avoid getting ripped off you can still find a worthy bargain in some of them.
Good luck,
- Mark