Lily (Lilium 'Starlette') sure is a beauty. I googled and found one vendor who carries it but they show it out of stock:
http://www.edenbrothers.com/st... Maybe you could contact them to see when they expect to have it available again.
I could not find a plant called Rainbow Lily. When I typed that name into our database, I got a return of many Daylilies containing the name "Rainbow" but nothing with a common name of "Rainbow Lily".
http://garden.org/plants/searc...
I found a Lilium called 'Little Rainbow':
http://garden.org/plants/searc...
This vendor carries it but it's also listed as out of stock:
http://www.americanmeadows.com...