Don't cheap out, by the time you find someone, buy, and have it shipped
it will cost almost as much as a new one, and your still left with used.

Laddle in the 5 minute epoxy after setting the broken pieces with a few quick shots of ca, then remove the ramp from the playfield, laddle in more epoxy to strengthen, add pieces of plexi or petg or whatever you have to reinforce it, then put it back in and play it. I did that more than 20 years ago... still works like a new ramp. In that position, you cant see much of that little ramp anyways... there are plastics and crap all around it. I got 2 new Heart beat ramps to go in mine, one NOS I bought in 93 or 94, and a second, a gift from my brother, is even signed by Python Angelo! I just never needed to replace it. If it aint broke, dont fix it.