What is important with fans for a radiator is the static pressure. Unfortunately I can't find any information online about the static pressure of this fan, but basically you can use any fan. Anything over 2mm water column is already very good. Good and quiet fans are available from Noctua and be quiet! but they cost a bit more.

https://www.pcwelt.de/a/so-betreiben-sie-einen-3-pin-luefter-an-einem-4-pin-anschluss,3442702

You should also be able to find similar products at Amazon.de, I have also used such products and they work.