We're in the process of organising a group buy of a DTS from ESP engineering:
http://www.espengineering.com/index.php ... ducts_id=4
The below link shows the thread and I know some of you on here are members over there too. The link shows it fitted to an S4 and a little guide from MarkB (thanks Mark!).
http://audisrs.com/about1986.html
We're up to 13 and with 15 we'll be getting this at a price of £145 delivered. 20 will be down to £140 and we'll get a free keyring each
Please register your interest on the audisrs link above.
Thanks!
James