I have ordered a copy of a 17th century English mouthpiece from Egger in Switzerland. Here it is installed on the trumpet:
It is a very high quality piece of brassware and makes a big difference to the instrument. I don’t feel there is a mismatch installing this on a rather wobbly instrument – the mouthpiece is very much the most important part of the trumpet, so much better to have a top quality mouthpiece on a cheap trumpet, than get an expensive trumpet and use a modern or otherwise dodgy mouthpiece. I suppose it is similar to my fiddle, an anonymous mass produced instrument, fitted with the best handmade natural gut strings.