LED headlights, rear lights, front parl lights and interior for 1964 plymouth Valiant

They do now, See Holley RetroBright

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So they claim

These LED headlamps sold by Holley are sourced through an intermediary company out of China, and promoted along the lines of modern performance with vintage looks. I had high hopes for them, but they turned out as a complete let-down. If you drive your car at night at all, you're wise to steer clear, no matter what price you might find them at. There are legitimate (effective, safe, legal) LED headlamps to fit any sealed-beam car, but the RetroBrights are not on that list.