As far as I remember, Pepper/Tanner did trade outs for jingles if stations would promote their guitar playing course, recorded on vinyl.
Wyatt, as for your question, there was a company out of Nevada that did what you are requesting. I saved a flyer from 2001 and tried to call the business last year and promptly found out that it no longer existed. BTW- are you still doing your "Sunrise" program? I talked to you years ago when you where with Chuck Harder's network and hosted the morning show with Dave Hand. I carried it on a nostalgia station that I programmed.