Where do you live in LA? I used to live near New Iberia and there was a house there that had a variegated philo climbing thier tree. I think it was near Highway 14 that runs through there.
I think the Glass House Works website has some photos of various philodendron vines including some variegated ones-even pink! There is also a variegated monstera deliciosa. Perhaps you can find the one you are looking for that way. I haven't ordered from them so I don't know what their plants are like. Maybe someone else knows. I am including the link. Also check under the Monsteras they climb trees too.

Here is a link that might be useful: philodendrons

I live in Fordoche. It's between Baton Rouge and Opelousas. I'm about 2hrs from New Iberia. The vine I spotted is in Port Allen across the river from Baton Rouge. It looks similar to the PHILODENDRON DOMESTICUM VARIEGATUM that I found on the link you posted. Thanks