I didn't think any of Agfa,Kodak or Fuji made powdered C-41 chemicals. It's all liquid. Agfa makes a small four roll kit but it's relatively expensive. Last I checked all small kits were expensive. It's cheaper to buy a bigger kit and throw out half -(

You can try

http://www.jdphotochem.com/

they've got small kits but once you factor in shipping it might be better to buy something locally.