I had some float R forks from 2003, I think. Anyway the performance was starting to show somewhat when compared with newer floats and they tended to be a bit divey under braking. They had been well looked after and were in tip top condition. I phoned mojo and for £120 bought a new, 2007 at the time, RLC dampener for the fork. I fitted it and the rebound/compression was/is a considerable improvement over the 2003 R dampener.
They probably cost more now, and if you can’t fit it yourself it’ll cost a lot more, as Mojo will fit it but they’ll want to service it at the same time. Very very easy to fit it yourself though. I never use lockout but I prefer a little more compression dampening than the factory setting.