No, but as I understand the wikipedia article, it seems a bit more complicated (or maybe it's just because I'm not comfortable with KDFs and HMACs)
Can it be used with ECDSA private keys?

Yeah that's true it's really similar! Not being a crypto guy (even though I'm rather good at maths) I can't imagine I'm the only one who tried that kind of things, so why is it not used?

Also, as I understand the article my implementation seems secure