I also wanted the convenience of a Dutch bike lock. I bought one of these about a year ago for $30. Heavy, but works very well. (It's the kind that holds onto your key until you lock it, so you're riding with the key in, FYI)
https://www.amazon.com/M-Wave-Frame-Lock-with-Chain/dp/B06XCZVNSX/
I believe this is a German brand fwiw