Their website is really great. Overview of the numbering system makes it easy to order. Good contact, emails are answered almost immediately.
Toni Romera is a very nice guy.
I ordered two mouthpieces. An alto with a cup deep of 22 mm and a
throat of 5.5 mm, and a jazz, cup deep 25 mm throat 6.0 mm.
Both with the round rim. You can choose between a rounded rim,
like Bach or a flat rim like Wick. The workmanship is first class.
The mouthpieces are slightly heavier than a standard Bach.
The round rim provides a secure hold on the lips. The response is great.
Tone binding is easier than with any other mouthpiece i have played.
You can have all models also with screw rims, brass or plastic and in large or small shank version.
Romera mouthpiece
http://www.romerabrass.com/