I do have WLR from great show breed stock, they aren't laying very well right now as Cornish really need to have the heat and sun on their backs, so it can be late spring by the time they start to lay. Now there are many WLR breeders throughout the country and many Hatcheries still do carry them, you will have to do some searching though. These birds are only popular in certain chicken world sectors, But you won't find many on these threads as it isn't the huggy pie kissy poo type chickens that most everybody here go Ga-Ga over and they are not the pet Foo-Foo type lawn ornament chicken that seems to be the ( TRENDY ) type designer chicken most BYCer's like. They are great birds but do and should have a purpose as a breed. Now if you choose to go that route through a good breeder they can be a little higher $$ as like I said they aren't designer chickens and bring a premium price for good stock and can be a tad bit more chalenging to raise, thats why you don't see much of them on sites like these.
If this breed still sounds good to you after doing more research I can send you some links to good sites of quality WLR Cornish birds.
AL