I mimicked the Elephant low friction mount. I added a longer bolt and 4 sets of self aligning washers to the front mounts .
This is just one of the 4 front bolts:
Click to view attachmentAnd on the rear mounts I machined the mount down to accomidate the self aligning washers on the top and bottom of each mount.
Here is a picture of the bottom of one mount:
Click to view attachmentThe self aligning washers cost about $50 for all 12 sets (8 front and 4 rear). It still took some fiddling to get the arm just right, but not too much. I was mostly concerned with the movement in the suspension travel range.
I must say that stainless washers may hold up better than the ones I put in. Looking at my pictures my washers seem to have some rust and it has only been 9 months.
BTW I bought the washers from fastenal and on some other post I provided links (it may have been on the Club site).
Did I say that I love the bushings and my 914 is smoother than my Subaru!