I paid $10 or $12 for it on Amazon last year. It was the cheapest one that I could find because they all seem to be from the same factory. It uses a proper retention mechanism instead of magnets, but ladders do a good job of pulling the mechanism and dropping the bits.
https://www.amazon.com/gp/aw/d/B08QMBB7XP?psc=1&ref=ppx_pop_mob_b_asin_title