Weld, I grabbed a used one off a 150 scooter at my shop, (for the manifold to engine) but I BELIEVE (not 100% sure) this link is the same item:
http://www.lifanenginepartswholesale...ke-p-9965.html
IF you mean the 24mm carb to manifold gasket, I'm told it's part number GS01 @ PCCMotoparts (on ebay) or @ 909-980-8806.....about $5 shipped.....
I've ordered the latter, but won't get it until Saturday....I'll let you know how well it fits....
And YES, original airbox..... :wink:
Steve