Wild hair idea. I wonder if you could cut a section from a glass or plastic tube that would act like a cylinder lens? Change the focus by the thickness and the size of the pipe you cut a section out of. Probably not smooth enough but an idea. IF it works you got all you ever need for nearly free. Since a laser is so small a beam, the lack of surface figure might be ok.
You might even modify it by flattening and polishing one side and then cutting it. AR coating is another matter. Can we do it ourselves??? stazy tuned....