Since Dave Bean is closer, I would suggest you call them first as the shipping might be a bit less expensive. I have Protech shocks that I like a lot. I haven't heard anything bad about any of the shocks available for a Europa.
I think Spax sells shocks for 2 1/2" springs and 1 7/8" springs. The original fronts used 2 1/2" springs. I would also use shorter springs with a bit higher spring rate.