Wiper arm upgrades

Hello. I have a 69 valiant witch only has one wiper. And the one it has has seen better days. I was wondering if anyone has put a newer wiper arm on their car that would be close to stock dimensions. I’m looking to do this just for the sake of being able to get cheap and reliable parts for my car without having to order it all the time. And I understand that this is not a purest decision so please be nice and if I should look elsewhere for help please point me in the right direction