Try posting on the wanted section of the FRA forum, someone may have something. Also try ebay it has random bits on there.
A piece of Ti 12.5mm by 12.5mm will be VERY heavy, would you not be able to use a thinner piece or use something like aluminium as it is half the weight. Or use a much thinner piece of steel?
ive got some aluminium stuff , i cant see a titanium rod having that much of an advantage over an aluminium one of the same size (is it for your axe?), also a titanium rod is going to be VERY expensive in comparison to an aluminium rod
ok , any specific requirments , smc have a wde range of aluminium and carbon fibre road in laodsa sizes , maybe a trip there would be good as i dont think you can order thta stuf inline from them.