I am looking for a product or instructions on how to make folds of skin under the arms of characters that run from the outside of the arm to the character's back or sides, sort of like a flying squirrel's membranes.  Does anyone know a "wing" product that will do this, or any other way I could possibly pull it off?

Thanks

Cobalt-Blue

Have you tried the "Search Renderosity" located at top right hand corner of web page?
I prefer using it's "Advanced Search" option to help filter to specific search locations.
Don't forget to check Rendo's Free Stuff section and use it's "search" option.
You'll be pleasantly surprised to find some wonderful freebies.

Another way is to have a winged animal (such as a bird) and turn off visibility to every part, excepts it's wings, and then pose the wings onto the human body. A lot of manual adjustments would be required to get the two figures in sync.  But I have found that a little patience and a lot of sheer bloody mindless determination can (but not always) pays off. LOL.

Attached Link: V4 Creature wings

 I've tried the V4 wings.  Unfortunately, they don't conform quite correctly.  I'm going to try LBA's idea just as soon as I'm finished with my current project.  I'm also going to try and see what I can make work with the old V2 Pappy's Shoulder Cape.  I was just hoping that there was an easier option.  Thanks though.  If you come across anything, I'd appreciate you letting me know.

Cobalt-Blue