Will the heater switches from a B4 fit the B3 and aircon?

[35i-VR6]

Anyone know if the heater controls from the B4 model will fit the B3?

as I know how hard they are to find ones that aren't broken now.

Also curious if its worth trying to fit the aircon system from a B4 as there's one in the scrap yard near me, its not the

climatronic one with the digi display just the standard type if you know what I mean

Cheers

Billy