I've made a 3x wide version here: https://makerworld.com/en/models/1063835#profileId-1052533

This compact and practical Dishwasher Tablet Holder is designed to keep your dishwasher tablets or pods organized and easily accessible. Perfect for placing under your sink, it provides a convenient storage solution that helps keep your kitchen tidy. The holder features a sleek and functional design, making it a great addition to any home.

The inner dimensions are 42x39cm that fits most tablets/pods

The holes for the 2 screws are 4mm and 8mm in diameter (I used screws with 3.5mm width that worked great!

If you have any questions or requests for modifications. Feel free to contact me!