Yes I have only one and it will fit front or rear, but I wouldn't run a welded diff in the front.
I also have 5.29 high pinion diff's that could be used in the front if you had lots of lift and needed to correct driveshaft angle, but these are pricey.
$500 with gears and no carrier or $1250 with a ARB air locker. These are gone
I also have some 4cyl housings and open carriers with no gear sets.