Looking for an "almost naked" type square cut speedo for 42" waist.

[PSDave]

Why don't you just buy the biggest that they make and see how it fits? They say you can return the suit if not happy. I have found that Andrew Christian suits vary greatly in sizing. (he is so busy making his idiot videos his quality control has suffered) If you get the suit and it is too small, do like I said and have one custom made.
Torchwatch has a good point about the suit. If you are wearing it in public, avoid the light colors. Stick to the black ones.