I've been holding onto these for the day that I built a super stock maxi, but I have a stock large port 49cc Monza top end now, so these can go.
Two Magnum jugs (one is very lightly ported, the other completely stock), one magnum head, one Maxi open port head and one piston.
I'll hone and oil the two cylinders before shipping so they arrive nice.
$45 + shipping. I imagine I can probably ship everything for around $20. If you're local to NYC, you can save that shippin cost and come grab them from my shop in Bushwick.