This part appears to be cast (aluminum?) in the shape of a triangle with two pins (part of the casting) that pivot in riveted pivot points on the mast (there is some sort of plastic insert in these pivots that are also most likely worn out) ... at issue is the cast pins are worn almost half way through ... is there a replacement part available for this ... or ... some better option for attaching the boom to the mast? Very concerned this part may fail sooner then later.