NEEDED………..

Hi,
I am looking for a new brake warning switch for my 68 New Yorker, (as per picture)
part # 2822023
mine is leaking brake fluid, changed the o'ring but still leaks.
When i remove the switch there is brake fluid slowly coming out, should this happen or is it getting past other seals inside the junction block.
Any help much appreciated, the car is going in for a roadworthy inspection and it won't pass if it's leaking.

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