Hello Dave, the cover # 40-17 is out of production but I have one NIP $22 shipped. Let me know if you are interested I also have a used 45 II that had a broken rear cover which I made a aluminum bracket to replace the broken carb mount it runs perfectly and has very low time on the engine I will sell for $75 shipped or $90 shipped for the engine and the NIP rear cover. My paypal address
[email protected] Mike