Hi Folks, this problem is a complete nightmare and Audi don't appear to give a toss, but luckily for me I found an Audi expert in Coventry who converted my 2.0 Tdi BLB engine to a gear driven oil pump, basically converting it to a BRE engine, if you live anywhere near Coventry or can get your can there, I highly recomend this guy, his name is Mike and his mobile number is 07970 478931, he fixed mine for under £1,000 inc parts, with a warranty and that was including a cam belt kit with water pump.
He also has an Ebay shop where he sells Audi A4 Tdi engines and also offers a fitting service if your engine is screwed, take a look at this link 2.0 TDI engine AUDI, BLB on eBay (end time 10-Dec-10 19:44:41 GMT) or contact him via his Ebay user name volksbreakers. Any work is undertaken and he speacialises in Vw/ Audi, in paricular the 2.0 Tdis, but will quote you for anything, give him a go.
By the way, I am not related in anyway, nor do I have any financial interest in this guy, I am just passing on someone who I found to be great, when Audi quoted me over 2K !!