"I feel your pain," but not literally ... sleeve length on my primitive T-Bar is 16" and that holds enough weight for my candy-ass, esp. if I go super-slow, super-strict, and/or go 1 arm at a time (Amazon had lots of handles !
)
For the Manlier types, I see vids of IFBB Pros past and present who use more than I can. Might be simply jury-rigging a 7 or 8 foot length of cold rolled steel with a washer = collar welded further down the bar would work.
If Ronnie + Branch @ Metroflex could do it in my old DVDs, then I'll never outgrow my primitive stuff.