Hi dutch translation is: buiskap. And Sportina 680 is often called ‘clever 23’ because that is how the dutch importer branded the boat.
https://www.miedemasails.nl/buiskap/t20e136/
Here you can get a quote for a buiskap for clever 23.
Did a search for buiskap on this site but didn’t find anything that would help you. They are plenty made so perhaps the above link is a starting point. English typically good. Try deepl.com
Good luck
Koen