wiper arms

Does anyone know where to purchase windshield wiper arms for a 1991 D150. I cant seem to find anyone who has them. Or is there another wiper arm that can be used to replace the OE arms??

Hello all, we just bought a clean 90 D-350, nice truck but no wipers. I thought finding new or used wiper arms would be easy it's a Dodge, I've search for hours online can't find any new or used, can anybody help? source or interchange? Thank you, harry