Mechanical Window Regulator

[PEU186F]

I am investigating possible sources for the mechanical window regulator that was used from the 407 to the 410 and I'm wondering if anybody has already come up with a solution

The best match I can come up with is the regulator that was used on the Mk Ii Jaguar. The front, business end, looks identical but the rear end lacks the second counterbalance spring that was used on Bristols. It looks as though it might well be possible to graft the Jaguar front end onto the Bristol back end, as it's the front end, where the cogs are, that's failed.

But if you know of a better approach I'd be glad to hear of it