The conservative orders generally don't produce diocesan priests, and many of them never wind up in the US.
The most well-known conservative diocese is Lincoln, NE (under Bp. Bruskewitz.) Their recently-built seminary does have a lot of men: but keep in mind that they admit men from *all over the country,* many of whom have been rejected by their home dioceses for being too "traditional." This does NOT translate into a significant gain in the # of new priests for the US, compared to the enormous outflow that's going to hit over the next 10-15 years as the majority retire.
Oh, but it does. Or could. If the reasons why these "too traditional" men are being rejected is exposed and changed. If all of the semenaries were actually working to bring out good, orthodox, men for the priesthood, we would see a huge difference.
Lincoln and the others simply point out the way and expose the pretenders.
SD