I’ve been using these toe plates for M3W and they work great:
https://www.ebay.com/itm/331724195351You can add a couple of sticky furniture felt pads at the back to measure of the actual rim.
BTW, I had a severe pull to the right from the factory, so had to upgrade the suspension with the Empire kit and dial in the castor/camber too.
Avons run much better at 28+ PSI.