Well, I've had contact from a few distributors today, one can't get a hold of a part for me at all even though they're SKF distributors. Another COULD get one with a 2 week lead time at a cost delivered to me of $250.
I've bit the bullet and gone for the eBay link I posted which is a Gates brand unit and all up delivered from ebay UK was $109. The price difference between that and the local SKF
distributor should almost pay for the installation!
I'll let everyone know how it all goes.
Cheers for all the help