Forgive my curiosity (OK then, nosey!), but why would you want a 4:3 TV?
Sounds a bit like trying to buy a Betamax VCR!
if it has a 16x9 mode, then a very big 4x3 is always fun as long as you don't mind the black bars (and i'd rather see black bars on a 2.35:1 film on a 4x3 set than on a 16x9 anyway) and at 37" big, it might well be larger than a 28" ws for the 16x9 area.