You go to this website and look at what they have to offer http://www.wackerengines.com/

I ordered an engine mount with carb spacers, prop hub adapter and a machined flywheel for my older Ryobi 28cc engine. The cost was $59.00 for eveything. They also have lorge bore walbro carbs and mufflers the the Ryobi. I order my parts off of e-bay but you can order from the website.

I hopes this helps