WANTED: 48cc spitfire squarehead

hi, im looking for a 48cc spitfire squarehead, or a squarehead with the same power output as the spitfire. they seem kinda hard to come by lately, squareheads in general. let me know if you've seen one around. thanks!
48 squarehead

HI I MAY have a 48, but zI KNOW I've got starfire 55's which is exactly the same as the spitfire 48 with a bigger bore from the same factory, I was a Spitfire Dealer, way back when and know these things from experiance.