Actually Caterpillar hasn't owned Solar for quite a long time.
Alturdyne
Untitled Document
currently owns them.

You might try there.

If you find yourself in need of parts I have two, also low hours, sitting in our dry dock facility left from the Navy. They are in Mare Island Vallejo, CA. Contact me via email re this forum or 510-407-6908

https://picasaweb.google.com/lh/myphotos