Like KW Machine's chain tensioner but it won't fit. Alternatives?

I really like this chain tensioner from KW Machine but it doesn't fit on the steel frame Felts like the Felt MP. I could make fitted shims to make it work but I don't think it will work so great. Is there anyone who sells something like this that mounts on a a slimmer wheel stay? The one from Ridely won't work either since I'm using a 62 tooth sprocket.

I need this for the chain to stay clear of the lower wheel stay. Your 2 stroke motor can be mounted higher and use a smaller wheel sprocket. With my predator 99 cc 4 cycle w/ jackshaft and 62 tooth wheel sprocket my chain rides very close to the frame. I picked up a chain last night and checked out the alignment of everything. I'll drill the holes to mount the engine and get everything together tomorrow. I have tensioners on the wheel axle so I'll see if I can get away with no tensioner on the wheel stay. If I need to I'll take the time to make good spacers to make the KWM tensioner fit.

I fit some nice groves spacers and it's mounted firmly and in line now. I'm wrapping up a few last things and should have it finished and posted here with 2 weeks.