Hey Langy.
Cebora don't use many different torches as far as I can tell. Prof 50 and Prof 70 seem to be about it, and you can get bits for those at the local cornershop. Weldmet could sort those, so could Little Stevie Weldequip I imagine.
What consumables does your torch take? - the part numbers will inform as to which torch you've got.
Si
Give weldequip a ring. Starparts make P30 replacement bits. He supplies their bits I think.
Or starparts direct
http://www.starparts.co.uk/starparts.html