I use Spank Spike Vibrocore 800 with 50mm rise myself and have cut off about 20:
https://www.amazon.com/dp/B07Q296KNL

Never had any issues with it. Think they do sell a 15mm rise one too. Don't know about shorter width.

If I had to say one bad thing about it, it's that you can't attach accessories where it curves easily. Tightening them down just makes them slide to a narrower section.