I have 2 reconditioned remote keys suitable for :
Audi A3 06.2005-03.2013
Audi S3 2006-2013
Audi TT 2006-2013
These are genuine keys in good quality new aftermarket cases, complete with blank transponder and blank key blade.
80 each. Can be cut and programmed for 40 plus fuel costs from Retford.
If you lose your only key the cost of replacement would be considerably higher, and the wait time can vary upto 3 weeks from the dealer.