I have only one area with full sun and I saw those pink ones when I made a trip from the mtns. of NC to Memphis. They grow all along the roadsides from Chattanooga and west, for quite a ways. I know they are supposed to be invasive, but I have a high bank on one side of my driveway and am putting things in there. It ends on pavement at the bottom so I don't think it will be a problem. I think this cultivar is called "Siskiyou"....I still have only ajuga and perhaps one or two Maltese Cross to trade.
Pink Evening Primrose
I have tons of pink primrose to trade-it gets about 8inches or so high and lots of pink flowers and boy does it spread! I cant get to it till the ground thaws! but you can have it for postage! =]