I have a stock Puch exhaust off my Maxi, its extremely solid, nice and shiny like! May be come carbon build up inside, who knows, I didn't disassemble it. $30
12mm (drill it out!) Bing (it doesnt leak!) also off my Maxi, with a 58 jet, also comes with a larger jet, i think its around a 70, but ill have to double check. $30
Shipping will most likely be around $5 for the Bing and $10 for the pipe.
PayPal is the easiest for me.