Believe it or not…its called a hose reel swivel…
This one has a zerk fitting… which should solve your issues.
https://www.amazon.com/RANSOTO-inch-Heavy-Swivel-Grease/dp/B0D791CVKW/ref=pd_lpo_d_sccl_2/131-1670236-2287521?pd_rd_w=mXq9Z&content-id=amzn1.sym.4c8c52db-06f8-4e42-8e56-912796f2ea6c&pf_rd_p=4c8c52db-06f8-4e42-8e56-912796f2ea6c&pf_rd_r=TFKHA0FGV0S1FFGDSMDR&pd_rd_wg=6mOFm&pd_rd_r=c4ac5499-a72a-4bc8-92ee-7666bd9bcff8&pd_rd_i=B0D791CVKW&th=1
not vouching for this particular one or anything… there are lots of other choices and YMMV.
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