I need a rear part of the rx7 Driveshaft to weld in another Driveshaft, does anyone know if someone sells the rear flange with the companion flange or even if there is another more common Driveshaft I can drill holes in to attach to the rear end that would be great too. This is the only part I need to get the thing moving

 

Driveshafts

 

I've seen Mazdatrix thank you though. i found what i was looking for.
For the next people that come looking. if you don't want to buy a full driveshaft and you just need the rear parts you can search for these part numbers.
Weld yoke: 2626-25
U-Joint: 2651-60
Flange: 2602-35
these are the three parts you need to hook the driveshaft to the rear. i think it says that the weld yoke goes in a 2.5 inch driveshaft if that helps any
if you need the front part of the driveshaft (front yoke) just look on mazdatrix

 

I'm curious, is there a similar companion flange that will bump up the driveline series to a stronger U joint? I might have to get out my spicer driveline catalog.