I also made a custom Postbit Legacy awhile back, but I never released the code to the public. I like Etiket Postbits though, they are really good.
NOTE: I did not use any code or images from Etiket, its my very own code and images.
If anyone would like to know how I made this postbit, send me a message. If a lot of people start messaging me wanting the postbit, I will just have to release the code on vB.org. But it took me a very long time to get my custom postbit perfect, it took a lot of trial and error, and a lot of testing. So I have the code all over the place, and its a lot of vB code and CSS, its just spread out in so many places. So if I do release it, it will take some time, since I have to gather the CSS and put it in one place. So it will be easier to install for the end-user.
Live Demo (No need to login):
https://thetechgenius.net/17-username-changes.html
Here is a screenshot of my custom postbit (check the image attached below):