Missing Dipstick
 

My cousin called and asked me if I knew where she could get a oil dipstick for her '96 Ram 3500 Cummins. Apparently the Valvoline Instant Oil Change here locally failed to replace it at her last oil change, yet they're insisting it wasn't their fault. I've looked everywhere and can't find a part number or link to a salvage yard with one. Any suggestions?

An ebay auction tells me the dodge part number is 4796874, and searching online I see it at http://www.factorymoparparts.com/4796874.html for under $14.