Modern Vespa

Does anybody know the diameter and pitch of the thread on the roll lock hydraulic switch. Mine is leaking and I find a replacement is round $120.00
While a brake light switch is about $15.00 which does essentially the same thing.
I was hoping somebody would know so I only have to bleed the hydraulic circuit once when I replace it.
They all seem to be 10 mm but with 2 pitches 1mm and 1.5 mm.

a brakelight switch is different its not sealed

the purplesensor is a kind off oilpressureswitch

but a oilpressure switch uses different seals brakeflued will blow the seals on a oilpressureswitch

I was thinking of the brake light switch which screws into the outlet of the master cylinder. It is engineered to be impervious to brake fluid and would have to stand fairly high pressures such as when the vacuum assist fails and you need to use both feet on the brake pedal to stop.