If you have Girling brakes, which I suspect due to the year I can't help you there but others will.
If you have Lockheed/ AP brakes I can give you the alternatives that I bought and fitted to my 1999 Plus 8.

Maybe worth a look around this siection.

2009 4/4 Henrietta
1999 Indigo Blue +8
2009 4/4 Sport Green prev
1993 Connaught Green +8 prev