I need a TAG McLaren TAGtronic programming cable

I have a TAG McLaren Aphrodite that experienced a flash-memory failure recently. My only options are to send it to IAG in Huntington UK for a costly repair (mostly shipping...) or do a firmware update myself. But I need this cable for this procedure and of course IAG is willing to sell me one for $150.00.

Does any kind soul out there have one of these cables they could loan to me? Or better yet - is this cable just a fancy CAT5 or CAT6 cable or something generic that I could buy at BestBuy without all the expense?

Thank you in advance for any help and replies.....

Please help me Obi-Wan-Kenobee, you're my only hope