I got a great deal on a wetsuit from Hollywood Divers in Hollywood. I tried on so many wetsuits in one day, that I wound up with a blister on one finger of each hand! I ended up with a one piece Henderson Hyperstretch. I've got to say that it's definitely one of the most comfortable suits I've ever put on.
If I were buying a custom suit, I would buy a farmer john from M & B Wetsuits in Long Beach. Don has been making suits since the early '60s and he is an absolute artist. I've got an aunt who owns a safety consulting firm next door to him. He makes most of his suits for commercial divers. He'll combine a nitrogen blown neoprene for the body to give you warmth with a stretchier neoprene for the arms and legs to make it easier to get in and out of. Keep in mind that not all neoprene is created equal! You can get a completely custom semi-dry suit from him for about $500. Dr. Bill on Catalina has one of these custom suits. I think it's lasted him for about 14 years with an occasional "repair".
Here's the info for the two I mentioned above:
Hollywood Divers
3575 Cahuenga Blvd. West #104
Hollywood, CA 90068
(323) 969-9875 or (818) 990-2279
M & B Wetsuit Designs
4414 Village Road
Long Beach, CA 90808
(562) 422-3493
Spend a day checking out all of the places that people recommend here and try on everything that's not custom. Oh yeah, if you do this, drink lots of water!
Hope you find what you're looking for. Let us know what you wind up doing.
Christian