6 weeks to find a Q4 is gonna be pushing things as they don't tend to come up for sale all that regularly.

The only one I know of in France at the moment is this one:

French Q4 for sale.

Seems expensive to me, but Q4 prices do tend to be on the rise at the moment. But on the plus side it does look in good condition, at least from a distance.

www.mobile.de always seems to have a few for sale as well.