Which crankshaft I need to buy

HI SIP tech team,

I have a 213 CC pinascco 57 mm stoke on my PX 200 elecstart engine, I have a PWK 30 mm carb.

Which cranshaft I should buy? can I take a 30 mm stroke one if I add 2 x gaskets (top and base) of 1.5 mm thickness. ?

What manifold and read valve I need to buy for my carb?

I need to place my order ASAP, can someone help me?