Consider buying Dana Spicer gears if you can't find the Revolution gears. The Spicer branded gears are made in the US. The cheaper SVL branded series are imports like Revolution gears.
List filtered to Dana 44 only:
https://www.danaaftermarket.com/aut..."type":"STRING","values":["DANA 44"]}]&sort=1
Dana gears should fit just like OEM (because they are OEM) and should outlast the useful life of the axle. There are also many more ratios available than most aftermarket only manufacturers produce.
Dana 30:
3.07 3.45 3.54 3.55 3.73 3.91 4.10 4.27 4.30 4.56 4.88 5.13
Dana 35:
3.07 3.27 3.55 3.73 4.10 4.11 4.56 4.88 5.13
Dana 44:
2.94, 3.07, 3.13, 3.21, 3.31, 3.36, 3.45, 3.54, 3.55, 3.73, 3.91, 3.92, 4.09, 4.10, 4.11, 4.27, 4.30, 4.55, 4.56, 4.88, 4.89, 4.90, 5.13, 5.38, 5.89
Once you find a part number simply Google it to find a vendor.