Anyone happen to have a good source for any kind of 8 inch tube endcaps that could be fitted by any means to an 8" OD 7.5" id Actylic tube? My aluminum milled endplates have turned into horribly expensive options, so I am trying to find a less expensive option that will work. But no one makes anything that I have been able to track down in 8" diameters. ideally i'd like to find some sort of 8" slip ring fitting with a threaded or bolt on insert.
Any ideas?