SIMTEK list some coloured JPT plugs:
http://www.simtekuk.co.uk/www.simtek...?p=12&cat=1630

they come up on ebay sometimes too.

TE connectivity/AMP part numbers:
For Junior Timer
2 Positions
Part No. 827551-1 (white)
Part No. 827551-2 (grey)
Part No. 827551-3 (black)
Part No. 827551-4 (brown)
Part No. 827551-5 (blue)
Part No. 827551-6 (green)
Part No. 827551-8 (yellow)