AUX In for non nav- 2 possible part nos but ones yanky?

[storminmike]

Hmmm

browsing xoutpost thread
http://www.xoutpost.com/electronics/nav ... ences.html

I came across this

If you have an E53 X5 made after 10/2002 then you can easily install an auxiliary audio input. You just need to answer 2 questions:

1. Do you have the navigation system or not?
2. Do you want to spend more money or less money?

Here are your solutions:
- If you do have a navigation system then you need one of these part numbers:
82 11 0 149 391 Retail $39.95
65 12 0 153 503 Retail $79.00

- If you do NOT have a navigation system then you need one of these part numbers:
82 11 0 149 390 Retail $39.95
65 12 0 153 502 Retail $79.00

As far as I can tell the 391 & 503 cable kits are the same and the 390 & 502 cable kits are the same. The only difference I can tell is that the 502/503 cable kits were released in Europe and the 390/391 cable kits were released in the USA.

So for a non nav we have (prices in £s guestimate)

aux in 82 11 0 149 390 $39.95 £24.66
or
aux in 65 12 0 153 502 $79 £48.76


Given that 82 11 0 149 390 is half the price then what's the chance of ordering it over the counter in blighty?

moreover where can I get it in this country or is it something like bavauto import?

[storminmike]

bump

nobody got an opinion on this disparity in price and how to capitalise on it?