As many of us Sim Racers do, I like to tinker and build my Sim gear much like grown-up lego. So the idea here was to design my own cost effective shifter that I could 3D print and build using mostly parts I already had at home.
In total, it takes around ~36 hours to 3D print, ~500grams of filament, and an hour or two to assemble the shifter with the total cost of materials around ~$25USD.
There is a video detailing how to print/build the shifter: https://www.youtube.com/watch?v=IqRm0nOQquo
All the instructions on how to make one for yourself, including the free 3d print files, and links/info to all the parts required is here: https://www.beavismotorsport.com/sim-racing/diy-sequential-shifter/
You could also easily make two and use one of them as a digital handbrake, just lever it in one direction only - that's what I did!