There are a number of them in the Big Valley/Bellville area of PA -- Peachy's [a common name here] comes to mind]. I've had Amish crews build fences, replace porches, and clear brush. Always honest to a fault. My main contact with them always says "we're like any other group -- some like to work and some don't."
But the problem with working with the Amish is the lack of phones. If you are going to check out a number of contractors you are going to going to have to plan a pretty good road trip. Also transportation can be a problem and added expense if they need to work on your site.