I managed to snag some bowls in the Daisy yellow. I bought these from a seller on etsy. I've only seen the 401 at flea markets and it's always in sad shape the the seller usually wants $10 for it and is unwilling to go lower.
I paid a little more than I would've liked for them but they are in great shape, they're the exact school bus yellow I love and my birthday is Tuesday. I've scored some pieces for one or two dollars so I figure it all evens out.