"good luck finding them" Ebay is awash in them (Mobile Fidelity Sound labs, Nautilus, Direct Disc labs, etc. half-speed mastered LPs). You'll pay more than in the early 80's however.
Running for Dummest question EVER
Is there (or could there be) such thing as High Definition Analog recordings and music reproduction, bear with me for a second, a process to engrave and read vinyl that would be in the nano tolerance. Forgive me if this is totally ridiculous but just curious to hear opinions.