I guess I will go for a US outfit then like Peter. The €73 kit from that German company people around here use looks like a complete rip off.
One of the I-get-you-anything-from-Spruce-just-pay-me-30% shops got this one at reasonable cost:
AVIATION OIL ANALYSIS KIT from Aircraft Spruce EU
@peter337: do you still send in samples from every oil change? I'm on a 25h interval (previous owner has been doing that for 20+ years) so it adds up to a lot of parcels.