Bari Harness/slings?

I own a music store on the midwest prairie. We have a female customer that plays bari occasionally in a local big band. She is looking for a strap replacement that is more supportive than the usual straps available. We carry the Blue Note sling, Blue Note harness, and Neotech harness - she tried them all and didn't like any. The harnesses are made for men (if you know what I mean :wink: ), and the sling just wouldn't pull the bari up high enough. Any ideas?