Presumably you mean the internal drain hose Barrie - not the standard external one?
I've always found e-spares excellent for washing machine and vacuum cleaner spares.
They might well have what you need. Indesit spares can be found at this link:
http://www.espares.co.uk/browse/at10...%20spare|pmt|b
Hope that might help a bit.
Good luck with the repair.