Questions about Rear drive shaft.
 

Hey my friend has an 84 K10 4x4 with a 700R4 and NP208. Truck is a shortbed, 10b rear

The driveshaft is destroyed due to it slamming the highway at 50mph, and it was the wrong one anyway because it had too small of a U-joint in it because it was for a 12 bolt truck i guess.

I've called about 25 junkyards and noone has it.

Is a K5 Blazer driveshaft the same? Does anyoone know where we can find this driveshaft? 84 K10 Shortbed 4x4 w/ 700r4 auto.

About 36 inches weld to weld.

Thanks