The international speedometer part number was 67315-08. Fuel gague was 63022-08a but you're missing more than just the gauge. You can find good exploded views and look up part numbers for everything at the link below. The link should go to breakdowns specifically for your bike.
https://partsfinder.onlinemicrofiche.com/ronnies/showmodel.asp?Type=12&make=hdmc&a=762&vehicleid=2009-Harley-Davidson-Street-Bike-FXSTSSE3-CVO-SOFTAIL%AE-SPRINGER%AE-(PT)
Waht did you meant that there is more missing not just the gauge?
Glad to help. Find the exploded view that includes the fuel gauge. There is a cup that the gauge actually sets in. From your picture I thought that might be missing also. I was looking at your picture on a phone screen so did not have a good look. But it seemed like that might be gone also.
Thanks a lot, will look into it.
I just hope, that those parts are available in EU.
Will try to contact our local ex HD dealer.
Once again many thanks!