Right been doing the front brake cylinders on my 1984 s3, got old ones off, realised the new ones don't come with new nuts, only 2 nuts are salvageable, I think there 1/2 inch, but I need to buy some more, and could do with a quick delivery, so what do I need to get ? (1/2inch unf nuts maybe, or unc?) and where can I get them?, thanks ben