I wouldn't want to lay any responsibility for this program on the admins...but how about this:
The admins create a new forum here entitled "tool exchange" (or something like that), perhaps accessible only to registered members. If you need some wacky tool, or have something you can loan out, post up to that forum. Make contact through PM and make your own arrangements for the loan-out (length/terms of lend, deposit amount and method, who pays for shipping, how shipped, etc.).
Indeed, perhaps the "database" of lendable tools could become a postable sticky in that forum.
Another sticky in that forum could of course be the "you take all responsibility, BC does not" boilerplate.
2004 Buick Lesabre Limited, Gran Touring; Bone Stock
1998 Buick Lesabre Limited, Gran Touring; Mods: Poly sway bushings/endlinks, Tru-Cool trans cooler, Thrasher shift kit (med), PLIM, front PEM; Mods in progress: Alot of stuff, but slowly...