Go to eBay and enter 5990412788 into the search box.
It will take you to a listing for a Lincoln .61 R/C engine. No, I am not connected to this listing in any way.
Does anyone have one of these engines? I like the American name of "Lincoln" and the red head that is reminiscent of the old McCoy engines of yesteryear.
If it was a .50, I would be tempted to buy one, but only IF the seller accepted PayPal or a credit card, so that I have recourse if it doesn't show up, or is defective and the seller refuses to honor conventional fair trade etiquette. Not that I think he wouldn't.
I just don't fly sixties that much any longer.