I bought a king pin set from ebay - they are made by a firm called Amsteer and they frequently advsertise steering parts. I have spoken to them on the phone and they sell bits individually including the track rod end pins. I know I have the box the king pins were in so I will see if there is a phone number.
Amsteer Sales Ltd - contact Alan Mills Tel: +44 (01827) 61000 at Unit 17 Ariane, Lichfield Rd.Ind.Est., Tamworth, Staffordshire B79 7XF; email: info@amsteer.co.uk. web: http://www.amsteer.co.uk/ Very helpful, got my P Type king pin bushes and track rod ends here.