So let me correct myself, they are made by Mr. Gasket and the part number is 4311. Here are before and after pictures.
Before:
After:
07JeepXK-
It is very simple to do, once you have removed all the brake componets then all you have to do is remove the axle nut and there are 3 botls holding the hub in from the rear. A couple taps from a hammer and you can remove it very eaisly. Then I just brought both hubs down to a shop where they pressed out the old studs and pressed in the new ones.