Tell us about yourself!
Unfortunately no (though I haven't looked into it again since 2014). At the time, I asked Amanda if the file size was that large because of inefficiencies in the file generation process, but she responded that the script was actually pretty efficient (ie no empty spaces in the output file). The complexity and precision of the grooves on a vinyl seem to make it difficult to reduce the file size by much, so from what I can tell, the best bet is to research what file sizes 3d printers are able to process seemingly nowadays, and see how close you can get to this without impacting quality too much.
That's not really for me to answer that. You might find 3D printing companies that can do it for less with same or better printer specs, I haven't explored this any further since I posted this comment 2 years ago. That was just for 1 copy though, additional ones were definitely cheaper to make.