matt, I rang pirtek yesterday morning and they werent able to help. they said they dont supply and would only try to repair it then they quoted me a silly amount as well. Anyway, yesterday I managed to get the hose off and went to andrew page stockport and managed to get a meter of hose from them. Its reinforced fuel hose so I assume it should be ok and also looks exactly the same as the original one but after trying for hours I could get the hose on properly. Its an utter nightmare to get on but going to try again this afternoon. The trick is a put a little cut at the ends to open them up a bit and to also warm the hose in boiling water to soften it. The bit that I managed to get on yesterday is a bit too short so has ended up kinked a bit so I'm going to cut a longer length and try again.
Btw, for reference its a 10mm fuel hose that will work and costs just under £8.
I'll keep you updated.