So let me correct myself, they are made by Mr. Gasket and the part number is 4311. Here are before and after pictures.

Before:
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After:
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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.