Fieldmouse,
i know yoru pain... the restrictiveness sucks for those chest harnesses...
it might cost a few more $$ but go to a rock climbing outfitter, and check out what they got.. i bought one for 59$ on sale that has padded legloops, and a padded wasite loop... what i figure is 59$ is a cheap price to pay to keep me safe and my family with a provider that can walk... without the aid of handicapped device...

i hope everyone wears SOME sort of retsraining device... its just LOGICAL!