Mazda Speed 2 piece Drive Shaft conversion question
 

I am trying to rebuild a Mazda Speed 2 piece driveshaft for the 1st gen RX7 for an Ep racer in the North East. The splined yoke that captures the carrier bearing in the middle of the shaft is shot. This part is not available from Mazda. They have no information about the origin of the parts used to make this shaft. This is not really a wearing part, so used is the way to go. I just don't know what to look for. Based off the other parts on the shaft, my guess is it starts life as a driveshaft out of a Mazda B1600 pickup. Has anyone had one of these repaired, or know what Mazda the parts are from? I have exhausted my sources.
the yoke is
2.958 from center of u-joint cap to end of hub.
1.725 from inside of ear to inside of ear.
.986 cap diameter.
1.290 hub diameter
1.645 spline length (through the hole)
.960 Spline Diameter
23 Spline count
.225 counterbore depth on hub side.
Trying to save this guy some money.
Any info would be appreciated.

Kevin Dennis

Dunno. Try Racing Beat? I know the 2 piece driveshaft is available from Mazdaspeed NEW.

"I know the 2 piece driveshaft is available from Mazdaspeed NEW"

Exactly what I am trying to avoid. $479.00. I can fix it for considerably less if I can identify what the shaft started life as.