I just used the system disk for a worst case test.

I found these contacts for Mtron SSDs in Europe:

Belgium:
http://www.ssdisk.eu/

Germany:
http://www.winkom.eu/

On www.ssdisk.eu you can find prices of 950 Euros for 32 GB and 1510 Euros for 64 GB.

My decision is made. I will get one of those.