Mystery solved! I decided to try searching for Paul Kaplan via a Hotbot search since my old computer at home can't cope with the fancy/java'd ASCAP/BMI sites. . .and the first place listed in my search was the Pioneer Valley Folklore Society--right in my backyard in western Massachusetts! So, I followed the links and found a website for Paul Kaplan, saying he wrote "I had an old coat" and recorded on his album, King of Hearts. . .and then it had his contact information. . .
HE'S IN AMHERST, MA, 20 minutes from my home! AMAZING! I called and after some phone tag, we had a very pleasant conversation. He published the song himself as Paul Kaplan Music, his address is 203 Heatherstone Rd, Amherst, MA 01002.
Another great song with a nice songwriter!
Hooray for this discussion forum and all of your help!