I second the HOR fuse selection. It is tougher than the bat. If you must use a bat, I found some at the local sporting goods store (Big-5 I think), also in Walmart in the toy dept.

I have heard there are different grades of flat bats, but since I have never used it... (I bought a couple at Big-5 with the intention of using them, but ended up using downspout and now aluminum)