Well basically from what I've found the two main options we have our 1, using the tow hook mount location. The link below is the only one I've found to have a bracket for a Euro style plate. I may use this one...still not sure how I feel about it looking there.
or 2, tapping it using a strong automotive tape like this one. http://www.amazon.com/3M-Company-Mol.../dp/B001B0QC3M
Many have had great results using this tape and it seems to hold well. Most say they have had it on for a while but it rains a lot here and I worry about it falling off some random day....that would suck!
One last option I didn't use in the main two because require drilling, just at a location where you can't or will never see it. Is this one.
Hope this helped.