Crib that fits Starlight Support mattress??

[borffmann]

I am buying a crib and mattress for our first child, on her way into the world in February. We love the Starlight Support mattress from Moonlight Slumber, and we also like the DaVinci Emily Convertible crib, but they don't seem to fit each other. In fact, all the DaVinci cribs seem to be wider than what would fit a standard mattress. The Starlight mattress is 27.5 x 52 x 6, and the DaVinci cribs seem to all by 33"+ wide.
Can someone please recommend a good standard sized crib that would fit this mattress? Or a comparable high quality foam (no off-gassing and all that good stuff) mattress?
thanks.