Deb (Bonehead), I spent some time looking around for Luca's Light. I didn't find any vendors that sell it, but I have some clues that I found here that may ring a bell with someone who can help. Unfortunately not everyone registering daylilies is a seller or makes them widely available.
In this case, the hybridizer is listed as Fretz and it looks like the last year she registered a daylily was 2017, which isn't that long ago. I believe this is Betty Fretz, who I think was associated with a garden center named "Floral and Hardy" out of Ontario, Canada. Unfortunately Betty list listed as deceased in the Ontario Daylily Society site.
I'm bringing up these clues in case someone knew Betty from a garden club or association. Maybe someone may know if Floral and Hardy was taken over by someone, or if Betty's daylilies are still being sold and if so, are they available in your section of "planet earth". It's kind of hard to get plants across borders these days.
