I would say the best is to contact
Pilot Training Network - Home: ATPL Pilotenausbildung / Simulator Training / Angebote für Airlines
It is Lufthansa Flight Trainings company for privat SIM Training.
They provide screening preparation and have A320 SIMs in FRA, SXF, VIE and MUC. Just contact them.
1h A320 would be around 500€ plus about 100€ for the trainer.
The other one I know is
TFC Training in Essen near Düsseldorf.
They even have a fixed base trainer of the A320, so that would be cheaper.