I made an electronic leadscrew for my friend. It uses the standard Taig mill x-axis leadscrew with Nema 23 motor mount. My original design had a leadscrew made with precision ACME threaded rod. It didn't use common parts and wasn't adjustable for backlash. The Taig component was only $115 and it came with motor mount, graduated dial, and has adjustable backlash.
I only had to make two parts for it. It was a little fidgety getting all the dimensions correct, but I managed. To put it on or take it off, once the leadnut mount is aligned, it's just a matter of loosening three screws.