Bezel Mandrels. Recommendations Sought

I’ve used bezel blocks to limited success. But recently decided to look to bezel mandrels to help make consistent bezel and wire basket forms. I found that inexpensive oval and teardrop mandrels are practically worthless as the proportions do not come close to standard sizes or proportions.

Is there a source of bezel mandrels that are well made and calibrated to be close to commonly available / standard sizes?

All recommendations and thoughts are appreciated.

Thanks all.