LeSueur Astropier makes an extremely beefy wedge for use with fork-mounted telescopes and their permanent piers. I have recently upgraded my fork-mount LX200 to use an AP1200GTO, hence, I no longer need the LeSueur wedge.
You can see it on the LeSueur Astropier web page under "Fork Mounted" and it's called "Aurora Polaris Wedge." My model is the heavier-duty one with 2 altitude adjustment bolts. Also included is the Azimuth Adjuster for use with this wedge (see under "Accessories").
It's designed to fit into a pier 8" ID. New, they cost $400. This wedge is built like a tank and in excellent condition. My price: $300 plus shipping from Ohio.
Thanks for looking.