R3M - CLA for Canon 85mm F2 Serenar

[CuS]

Just got my adapter to mount the Serenar on my R3M (looks sweet) - I'll post a pic 🙂

But, the lens has a pretty stiff (though smooth) focus ring and the aperture ring binds a bit.

Can anyone suggest a good person/place to have the Serenar CLA'd?

Also, any rough idea on what it might cost?

Thanks!