Folding stock with shark fin?

I’ve been interested in getting my first AK, and I’ve been thinking about what style I’d want for my only AK. I love the under folding, and I also like the Romanian dongs. Obviously those won’t work together, but would an under folder work with a shark fin? If so, is it only a particular fin that will fit or only modified dongs?

The first one is the looks I’d want, is this functionally possible or at least reasonable enough to do myself?