Pursuant to the previous post, I went ahead and re-mixed my Sigma album and mastered the audio per the technical specifications of petroleum-disc reproduction. I also completely re-designed the cover artwork, in Adobe Illustrator, to reflect the medium and concept of the two-sided LP record, even with lyrics printed on the inner sleeve. Then, I uploaded the audio and art files to the Elasticstage site.
I've still to receive my copy of it, but one can order it here. The irony is that I might never hear how the music sounds played from vinyl, since I don't even own a turntable. After all, I'd thought that we all were beyond that.