Wow, lots of luck finding that one. That is for an International Hobbies motor and they've been out of business for a few years. There was an attempt to get the company going again but things fizzled out.
What you have there is more of a collectors item now than something that I'd try to run.
For the K&B on the left, DPI made some covers for them. Bob Kinsell at Phil's Hobby Shop used to have some but I don't know if he or the store have any left.
Try the Lake St. store, I think that's where Bob works at. If not contact Steve.