http://www.directfordparts.com/partlocator/index.cfm?action=getLocator&siteid=214290&chapter=DN2022&appSectionid=23&groupid=10047&subgroupid=60093&componentid=0&make=10&model=Ranger&year=1990&graphicID=T022380&callout=4&catalogid=1
driver side axle you'll have to specify 28 or 31 spline I'd buy them aftermarket through napa or jegs though its way cheaper than the dealer