Actually, Probikekit.com sells the steel-railed Rolls for $28, while the Ti version goes for $87 at Universalcyles.com. That is quite a price differential!
I have sent an e-mail to Probikekit.com asking that they look into carrying the Ti version in their inventory. They replied saying they'll ask their supplier to look into it.
Beanz, if you have ridden steel-railed saddles before, do you notice any difference between how those rode, as compared to your ti-railed saddles?