Re: cab makers, can anyone recommend a good one for a fender replica
well, not really---what are you looking for? There are lots of people out there who make repro cabs for the most common models (most tweeds, BFDRs, BFSRs, BFTRs, etc etc). If you want a 6x8" cab for a Princeton Reverb, you can still have somebody make it, but be prepared to pay muchas platas...check the 'Enclosures' page at Weber VST for some good makers.
BTW, nobody makes a Fender 'replica' cab complete with logo and tube chart except Fender, unless they want to end up in court.