I phoned up The Bass Merchant and he said he had a pair of Mark Bass ears floating around and was pretty sure that were from the SA450, so I'm keeping my fingers crossed.
To be honest if that fails I dont think it's beyond my capabilities to ebay some cheap "standard" ears and relocate a few holes if needs be, even though Im from West Bromwich.
Then again I have no experience of racking. (ooeerr!!)
I like the look of the gator stuff, anybody good or bad with gator?