thanks all, out on my my bike now, if I can get back in time later will be going down with my deposit, here is reply from Mountune the very helpful David Jones:-

We have extensive stocks of parts so supply is unlikely to be an issue in the medium term. However CLF are just one of many suppliers that we use. The exhaust design is unique to ourselves and we would re-source components to one of our alternatives should an existing supplier be unable to support. This applies to all components.

If you need any more information please let me know.

Regards,

David Jones
General Manager - Automotive Group & Mountune Performance
Roush Technologies Ltd.
Tel: +44 (0)1277 261400
Fax: +44 (0)1277 261525
Mob: +44 (0)7801 336890