Adapting "crémones anciennes" knobs for modern windows?

[joidevie]

Hi..

Has anyone had any experience in adapting old original "crémone" knobs/mechanisms to work with modern windows? I'm not really looking for the 'upright' bolts to actually move or lock into the upper & lower window frame, merely to perhaps mount these for appearance. I'm wanting to somehow make the 'knob' work with a square 'spindle' required to turn the modern internal meachanism..

I hope this makes sense! Any ideas?

Many thanks..