These from Pinball Life work GREAT on the Pro @ $55.
http://www.pinballlife.com/index.php?p=product&id=1956
I also just replaced the factory ones on our new KISS-LE, while I love the new design with Rubber Bumpers on the bottom where it sets on the Lockdown Bar so it can't scratch the Cabinets painted wood, there is no Freaking way to get the PF BACK into the Cabinet without SLAMMING THE CRAP out of the PF into the Cabinet to get it over the rail "bumps" or "lifting up" the rear of the PF to clear said "Bumps" to slide it all the way back into the Cabinet.
WTF is going on with Sterns Designers - is NO ONE there Testing/Using these "new" changes before they implement them ???