One other thought, repair the one you have. The ball mount socket is quite sufficiently robust for the insertion of Helicoil™ thread repair inserts--or any of the numerous "helicoil type" clones. Here's a set for M5, M6 and M8 threads for $6.99 on Amazon (you'll need to use M6 size from the kit).
Re-drilling and tapping the holes, and placing the inserts is quite easliy done (and remember if you do screw it up you'll not be any worse off than you are now), however if you are uncomfortable with doing it, buy the insert kit and find a local machine shop (or even a trade school shop or a reasonably competent auto shop) and ask them do it. I cannot imagine their charging too much for doing this...
Re-drilling and tapping the holes, and placing the inserts is quite easliy done (and remember if you do screw it up you'll not be any worse off than you are now), however if you are uncomfortable with doing it, buy the insert kit and find a local machine shop (or even a trade school shop or a reasonably competent auto shop) and ask them do it. I cannot imagine their charging too much for doing this...
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