Yes, I was disappointed the WSQ didn't do that on their R&B album, just take the voices directly from vocal group performances and transfer them to the horns.
Bill Frisell et al doing the Delphonics' La La La La La La Means I Love You, I love this but as far as I know there's no official hard copy product. I think this was the final tune of an otherwise fairly standard (for them) set list.