Blue Ox Aventa Tow Bar-can I fix it?

#1
I have a Blue Ox tow bar (Automatic Equipment Manufacturing, Inc.)
It is about 10 years old and has been used a lot. The ball bearings have started to fall out of one of the self adjusting arms. Has anyone had this problem and fixed it?
 
#2
Blue Ox Aventa Tow Bar-can I fix it?

I have done some research on this. Blue Ox sells a Lock Repair Kit for about $270, including shipping. A new Aventa II tow bar (steel design) is about $500 and an Aladdin (aluminum) is $600+. I have found some used tow bars that might just do the trick at a cost similar to what the repair kit costs.
 
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