Brake pressure regulator trouble - advice required

Hi all, has anyone had any luck in locating a repair kit for the rear brake pressure regulator on a late bay. Heritage tell me it's a discontinued component, and they don't yet offer a repair kit.
Mine's just failed the mot for leaking......

(I've taken it to bits and it's ok apart from the seals.)

 

Clean it all up and put it back together with the merest smidge of sealant.

 

Which seals are worn out?

 

Have you tried urinating on it? Seems to cure all sorts.

 

We'll be going down the VZi route next... jizzing on it, and setting it on fire

 

Sorry. Been watching too much Bear Grylls lately.

 

Ah, you'll be skinning a snake and using the aforementioned skin to make a bladder to keep your water in

 

That's a good idea. But I'll need to wee in it as well.

 

To sterilize it of course....