Get them custom made... You'll like them a whole lot better.

This is a classic case where your local dive shop should be patronized. Since
you want to be able to know if the suits fit, and you want them quickly, you
probably don't want to buy/try/send back and wait for another size.

I am a big on-line buyer and have bought quite a bit of gear that way. I
have 'tried' to purchase a 7mm on-line and ended up having to ship it
back(read pay for shipping) twice and finally went to my LDS to get a suit
that fit. Well O.K., it did back then <g>.

Try http://www.diversdirect.com or http://www.leisurepro.com
We got a total of 6 wetsuits in the past several years, from the above
websites. OK prices, OK delivery, most of the time.
5 suits were 3 mil. 1 a two piece 7 mil.
Now these guys have "size charts", and they work just fine, but, unless you
fit into that chart, a very close fit is what you want, for a 7 mil. Go to
your local dive shop.
A 3 mil. suit, no problem, a 7 mil. stretches not so easy, in what ever
direction.
My two piece 7 mil. Henderson, from leisure pro, fits fine, but not perfect.
Delivery...promised on line.. 2 weeks, was close to 3 months, with countless
emails, and phone calls.
Like I said 3 mil. OK.....7 mil. I'd go to my local dive shop.