I gave up on the original mechanical instruments a long time ago (no matter what I did the tach screamed and the needles bounced). I made up my own instrument panel with newer used instruments but the same thing happened with it so I eventually gave in and went electronic, first with a cheap Koso knock off from eBay/China (there is a reason they are so cheap) and later with a Danmoto 180, which I would highly recommend except that Danmoto stopped selling instrument panels.
But there are any number of other instruments available that other forum members have used with success. Many of those are great on other models but might not fit inside your Euro's fairing so if you go that route check for that before you order.
I understand that the ones sold by Trail Tech are pretty good, I think they are small enough for your space and the last time I checked they have housings with LED lights to replace the indicators on your original instrument panel.