roll bar
 

Does anyone know a good place to get the rollbar hoop bent am really struggling to get it done anywhere around my area i really want it done in 50mm tube if i can thanks for any info in advance

There's always a few on ebay or try your local fabrication workshop.

the only one i found on the bay out of 50mm has crimp marks on the inner edge

any metal fabricators should be able to do it.