A few days ago I posted about cracking on my Alpha ramp (https://pinside.com/pinball/forum/topic/stern-star-trek-le-alpha-ramp-entrance-cracking).
Jgaltr56 suggested that I should email Andy at email@example.com. I contacted Andy and he pointed me to his eBay auction for this mod for $48 (US) for 2 sets of protectors for the Alpha and Beta quadrant ramps.
I highly recommend them to protect your game. It was easy to install.
The full set of pictures is here: http://purcellvillepinball.com/STLE2015.html#RAMP
Here are a few pictures: