<<Disclaimer: Verify this information before applying it to your situation.>>

Thanks for all the responses!

Folks recommended:

4 for Arrowhead Mills puffed rice
3 for Malt-O-Meal brand - (1 person said not a GF dedicated line, but line
   cleaned thoroughly in between)
2 for Barabara's brown rice krisps
2 for Krogers store brand
1 for puffed millet
1 for Kellogs Puffed Rice
2 for Erehorns rice twice
1 for cooking your own buckwheat
1 for Gluten free pantry oven toated crispy rice cereal
1 for Gruduns or Gurdons that you can buy from Kinnikinnik in Edmonton Alberta
   Canada at 1-877-503-4460
1 for products by WWW.Kinnikinnick.com

Thanks for all your help!