Need information for a tiller?

I have an older tiller that needs parts. I took it apart and took it to several parts suppliers in the area & they said it was an old troy built. I came home & called troybilt/MTD & they stated that troybilt did not contract it for that year. I have searched for weeks on the phone and online, but have not found anyone that can help me. I am hoping that maybe you can help me find out some information about this tiller. It is a 1988 ServiStar rear tine tiller, model #130292, type# 3111-01, Code# 88012607, 5HP Briggs & Stratton. I need to replace the tine engage belt, the bushings and several small parts. There is no serial # any where on this tiller. I have looked at every square inch of this machine. My e-mail is fourtbone@aol.com.
I really appreciate any help I can get. Thanks Mrs. Bone