I'll sell you the 6mm thick base mounting plate and oil seal rings for £30 you can have a go at making one your self, shouldn't take you much more than a complete working week to make a jig,cut all the plates with a grinder and weld it together so it's oil tight.
Don't forget the book is called 'build a car on a budget' not 'build a car for free'
Also has every body met my new publicist and Roadster historian 'PorkChop' doesn't he do a wonderful job, he's worth every penny!
(shame he doesn't get paid for it)