Matrix Driver Shaft - Speed Rul-Z 50 R flex

[RyW]

I was recently on a golf trip to Portugal where I hired some clubs.  The driver was a TM aeroburner with a Matrix Speed Rul-Z 50 R flex.  I don't seem to be able to find one for sale online or ebay.

Assuming this shaft has been dis-continued does anybody know of a similar Matrix shaft that may be very similar to the above?

I have a TM M1 and I am keen on changing the shaft. 

[Adam C]

You can still find those shafts around, although I would guess you were hitting the TaylorMade TP version of the shaft. I know they made an A,B, and C versions. I found the B version 50gm R flex on Diamond Tour Golf website. A and B were similar except the B is counterbalanced. C was a different animal all together. If you can't find the A, the B should work, just be aware that the swing weight might drop if you don't extend the playing length or add some head weight. Honestly I believe the most important aspect of a shaft is the weight, so if you can't find the exact one you want, start looking at others with similar weights first, then move on to other specs.