Rag joint

[c20pickup]

Where do i find a the rag joint for our trucks? I have a 70 c20 with a rebuilt stock gear box, i test fit an old rag joint off of a 71 c20 to make sure it had the right splines, so far i purchased two joints and both are wrong, one was purchased from the place i bought my steering column and the other one is from gmcpauls. The gmc pauls has a large diameter and a metal tab on the non splined side of the joint which doesnt look right to me. Just need a stock replacement joint. Ive looked into converting it to a ujoint style, but im not sure which one to order