Hi fastfitter, yes thats the item i need (#5)
Not too clued up on stuff so wasnt exactly sure what i needed. I'll take a trip down to our Honda dealer this week and get it sorted. I'd better print that diagram to bring with me, they seem to be even more clueless about bikes here than me
Cheers
Edit: With your help ff i just bought that gasket on ebay, used the part number for a search and came up with -
Honda Genuine Exhaust Gasket 18391-ML0-003
150394023687 - Price: £7.95
Quantity:1
Free P&P
Searched loads of pages earlier too with no luck (but to be fair i was searching for a seal

)
Thankyou