Someone on the Orchid Board came up with the correct name which appears to be RLC Dorothy L Adair. If anyone knows where/if it's available I'd appreciate it.

I would check on eBay, unless you can find someone who has one to divide.

You don’t really see older crosses for sale at retailers very often.

You should post this on the Orchid Exchange. Maybe someone would be willing to trade or divide theirs.

Give Odoms a call. I have found them helpful finding old plants. Surprisingly, they have a lot of older Catts and old crosses they use for breeding. Sometimes they will offer a small division for a low price.

Jane