Dave I like your "nipple" caps.
Whilst I have seen some for sale I haven't a clue what size you need for the brakes & suspension lube nipples.
Any pointers where to get them & what size to order ?
Bob
The nipple caps are available on internet, however the prices seem rather high for what they are. Have a look at "Nipple Shop", these are the people who supplied Robbie's remote greasing kit. They are selling them for only 22p plus VAT.
Other suggestion would be a motor cycle shop or if you are going to the Classic Motor Show at the NEC, 14th - 16th November, I would expect that one of the stalls would have them for sale.