All Nova MEGA engine are listed here...

http://www.serpent.com/product/novamega%20sx12

My question is...what is SX12 SPEED..? Never heard of it....

If you have to try to find P/S...any 3 ports late 2000-2002 Nova Rossi type engine will fit HOWEVER you must find the correct conrod to fit with...and good luck finding those cause I don't think ppl are still selling those.

These motor has been discontinued at least 3 years plus....you should sell the motor for parts and get some money of it.

I might have couple 3 ports P/S from Nova rossi, but I am not sure I sold them or not...I need to check.