I got into the plate making business because of fit issues when by wife Jeanne's BC finally bit the dust. She demanded a back inflate with "nothing up front", from 30 years of diving a Scubapro BCP "batwing" with a harness backpack. No "branded" system made what she wanted, so I got stuck with the job of doing a custom plate. It's proved to be somewhat popular with the online divers anyway so I'm still having them made. (Thanks guys!)
A wing, with plate and harness can be had for a price equal to or less than the "branded" BCs, and are even more comfortable for many ladies once she has the harness system dialed in. Doff and don in the water is a different set of skills with a plate than a jacket, but just as easy to master if the instructor has a clue. (Regretably many don't have one when it comes to wings! remember "different"="we don't sell it"="bad")
In any case the research into the wing/BP world will be an eye opener. Remember too that the "DIR" thing is only a SUGGESTION, not a rule. If she wants to modify the harness to suit HER body and dive profile, so be it. If she later wants to dive for WKPP in deep caves, she can re-rig then. Jeanne uses a right shoulder strap stainless steel buckle disconnect and an adjustable waist strap without a crotch strap to ease doff and don, cause that's what SHE wanted to do and it fit her body profile and dive style best.
FT