This is what I have...
Works great, readily available, and won't break the bank.
I have a couple of the Medalists around and I don't believe they're weight specific. They just make a smaller one that would work for 4 wt or so, and a big one for heavier line. I could be wrong, but that's all I can remember seeing.
Maybe just search flea bay for large Pflueger Medalist fly reel, maybe?