Here's a link for Dexter Axle and a distributor that came up for Wasilla. Looks like the same company is in Anchorage too.
https://www.dexteraxle.com/
Six Robblees, Inc.
2281 East Sun Mountain Avenue
Wasilla, AK, 99654, United States
Ph: (907) 376-8000
www.sixrobblees.com
Sells Retail
Stocks Axle Beams
Sells Wholesale
Sells To Dealers