Start by seeing who has good ones here and at the other BYC forum... mostly, you'll get the best quality Frizzles from show quality cochin breeders (I assume you are looking for frizzle cochins)... Remember that whatever frizzle breed you get will need to stand up to the standard of whatever the breed it is... cochins or Polish or???
Shari at Harvest Breeze has incredible Cochins including Frizzles... and she's on the board here. I have some nice birds from her.
Be ready to pay for shipping and if it gets hot soon, be ready to wait! But, it will be worth it!
Frizzles are special... I just love my frizzle girls!