You might find what you are looking for here......?
www.cressi-sub.net/
I bought my BCD on the net. I went for Large as I reckoned I could always cinch it tighter and wanted as much lift as possible. I quickly found I could never tighten it enough and with a 300bar/12ltr and pony attached it always had a tendency to slip around the place.
Now thanks to my superior sense of balance and a dry suit all is hunky dorey
Took me an absolute bleeding age

trying out how to rig it though and was constantly changing things around so as to make them natural and handy. One thing that quickly became apparent is that D rings are best in metal and you can never have enough of them
Happy hunting.
Chris