Hey, so just wanted to update anyone who might care. I wound up going to a driveshaft specialty shop not too far from me, I brought in the yoke the the guy there helped my find a flex disc that actually fit. Not exactly the same size as the old one and the bolts were a slightly different size but it was close enough to get me back on the road and so far it drives great. So no new driveshaft necessary, and thank goodness for that cause those rear diff bolts were stuck on there lol.
Thanks to everyone who responded and I'll try to post a picture/part number of the part just in case anyone else runs into this issue, they won't have to go on a crazy goosechase like I did.