I have one that I put together and it's free! https://toyhou.se/3483050.window-html-ftu-
It's supposed to be fairly flexible, and easy to remove any of the elements to make a smaller page :00 (or add/modify more to make it more complex) Plus I tried to add plenty of comments to make it easy to understand ^^
I don't have many examples of how it could be simplified yet, but here's how one person modified the template to fit their needs !
https://toyhou.se/3478494.blink ((The character tab also has a much more modified/simplified version!))