You may get more responses on the Performance Paddock Forum.

The Heim products have been used in race cars with great success since their introduction at least 35 years ago.

You can probably get these components from MSC. Their website and online catalog are at: www.mscdirect.com

A little simple measurement and exercising the grey matter will come up with adjustable members that will be far stronger than original as well as, of course, adjustable.

Good luck,