tr3 stoneguards

to all listers,  just purchashed a set of rear stoneguards for my tr3. i 
realized that the original pressing machine that was used to make them is no 
longer in used. with the aftermarket sets available today, does an one have a 
solution as to how to mount them and get a near perfect fit?    happy july 
fourth,  
larry schwartz  1960 tr3-a  supercharged