What I almost have to laugh at is I tried to order one of those engines from MECOA back in 2011, was told I would have to wait around 6 weeks. Checked back after 8 and they still had nothing to sell and, AFAIK, probably still don't. I ended up going with a Nova Rossi instead since I was able to get one of those quite easily.
I think(notice, I said THINK) K&B was still being operated by the original owner because parts and engines were still readily available back then