Graphite Saddles for Accent Vibrato?

[squid]

I remember someone (I think it was Peter) saying that they'd swapped out their standard bridge saddles for graphite versions to reduce the friction caused by an Accent vibrato. Which graphite saddles should I be looking for? Is there a better solution than graphite? I know rollers would be best, but I don't think that there are any after-market roller bridges that would do the job, are there? It's not a pressing need. I only use vibrato gently.

Oh, and let me add how brilliant it is that the Accent is just "plug and play". No drilling. No aggravation. Totally reversible.