A buddy of mine here in Michigan sells ceramic bearings for various cars and just received a new shipment which includes front and rear bearings for 1/12th cars. I do not know if he has unflanged front bearings, tho.
If anyone is interested I can ask him to post on here with his info. He's primarily just been selling them locally to the local hobby shops in the area.
Or, if you are a hobby shop and would like to carry his bearings, let me know and I'll have him get in contact with you.
His prices are low so you won't cry for a day if a bearing gets blown out in a bad crash.
-Rich