Have you tried Memo-Omega parts in Texas? They pretty much exclusively work on Deutz Diesel engines. I would think that they would have everything you need. Otherwise, a junkyard or ebay might be the only other place to go other than a Deutz dealer. They are certainly not as common as other diesels. I was looking at a EPA certified F5L912 a little while back, but after seeing how bad it smoked, I figured the cost of a rebuild would be astronomical.