Fitting AMI Interface

[Glync]

Blimey getting this AMI sorted is a complete minefield, would appreciate your thoughts on my experience today

I had made contact with a main Audi dealer a few weeks back and got the part number and price using the chassis number of the car this is the quote from the email..............
Item 4E0057785F
Description
AMI Retrofit Unit
Application
A4 week 46 / 2007 > week 21 / 2008, A5 week 45 / 2007 > week 21 / 2008, A6 week 45 / 2007 > week 21 / 2008, A8 week 45 / 2007 > week 21 / 2008, Q7 week 45 / 2007 > week 21 / 2008
Information
For vehicles with MMI High (Most Bus). Please refer to bulletin AU0430-08 for required additional parts.
Detail
Price
£189.00 All Prices Are Inclusive Of VAT.

So popped in there today and asked about ordering this, mentioned that I was aware it would require certain cables to allow the cd to work and the ipod to be connected. They seem a bit suspect of anyone wanting to fit this themselves!
He said I suggest you try a place called mobile comms nearby who will do this cheaper, we send most of our work there????
So I thought I would, out of curiosity really! Went there and they they quote £350 fitted. I explained I wanted the parts only, and said Audi Main Dealer was 189 and showed him the email! He said is what they buy them in for and that the cost covers them ammending the system to work with AMI fitting etc, I pointed out I had upgraded the software myself for this and the fitting didnt appear to be a great problem once I could get my hands on the parts!

So I thought b*gger this and headed for another Audi dealer (local to work) as I needed to get back to work and was running out of time. (Tamworth)

Spoke to the chap there who whilst very helpful said this was now an obsolete part and factory fit only (not retrofit??) but he would check with Audi head office. Stated cables required would be £75 ish. As he was waiting for Audi to come back I said I would phone them later as I needed to get to work.

Phone call this afternoon
Sorry this part won't fit your car the AMi will only fit cars after week 22 build 2007. My car is a late 06 build registered in 07.
I pointed out I know of cars and owners with earlier cars who had fitted this and think they are wrong but they stood their ground and state this part is not suitable for the car and my car is not compatible with AMI!!!
Frankly I lost interest at this point and they suggested I speak to Audi customer service. I had a meeting to go to, so thought sod it for now !!!
What do we make of this?
Whilst I am not in a major rush I was hoping to have this sorted but am at a loss with these dealers!
Cheers
Glyn