I can supply them, or alternatively put you onto a chap that does racing looms for a business, he is happy to supply them but don't know if he will mail order.
I have just done a load of mine and they were from memory about £3/4 each for two way, about £5/6 for four way can't remember the others.
You could also look on POLEVOLT website as they do them as well just a little dearer but still not bad.
tabetha