BMW power performance pack 520d

Hello,

Any suggestions where to order PPK for a BMW 520d, B47. At local dealers the price is around 1200€ for a pack and plus around 200€ installation. I consider this price too much for an old car. I would prefer finding one cheaper in Austria where i can take it from by my self, or i could order it in Germany and install it locally. At the end of the day if it is not possible to get it for more convenient price i will still be fine with 190PS. I could remap it but i am not sure if it is as much safe as original PPK. Thanks for your suggestions. Regards. Katunga