I highly recommend
www.diveskin.net.
I have been looking into this recently and have decided on their Black Seal wetsuit, custom fit at no extra cost.
After much deliberation I got a custom fit 3mm Heiwa Neoprene smooth cell out/nylon in, attached hood, 2 piece, high waist, wetsuit with water seals on the wrists and ankles for $199.00 shipped.
Spiros (aka diveskin.net) is a great guy, and everyone says that his suits rival the quality of Elios at a better price. I cannot say one way or the other as my suit is in the mail, but I would definitely recommend him on his customer service. He makes all of his suits out of "high quality" Heiwa neoprene and custom fitting doesn't cost extra.
For you I would recommend a 5mm, 2 piece, custom fit, high waist, nylon out/open in, with attached hood. The custom fit improves warmth greatly, as well as water seals on wrists and ankles, and open cell directly against the skin. This all stops water transfer and keeps the same layer of water against the skin during the whole dive. So, although the suit may sound thin, it may actually be too warm. But the hood can make a great difference on warmth, and if you are too warm you can always flood the suit or remove the hood. Also, the 2 piece and high waist combination only minimally restricts your breathing.
If anyone has any specific questions about a freediving wetsuit feel free to PM me as I have just spent hours upon countless hours researching them, and I feel that I have a pretty good grasp on them. If I can't help you I know people who can. Thanks!
Till Later...
~James