I recently inquired about the same parts and was told to look at [link=http://www.fpengines.com/html/13.htm]First Place Engines 1.3 Conversion[/link].

I contacted Kurt and this is the response I got:

Matt

Here is a list of the parts and prices:

1.3 pitts muffler with bolts $75.00
1.3 Fonolic carb mount with bolts $18.00
1.3 Prop Hub with set screws $30.00
1.3 Carb with bolts $30.00
1.3 Carb Gasket $3.00
1.3 Prop Bolt $5.00
1.3 Aluminum prop washer $6.00

Thank You
Kurt Roth
(724)588-9559