There isn't as far as I'm aware, except at codejunkies.com. The codes you find in the GameCube section are likely the same ones you'll find on the latest disk.
http://uk.codejunkies.com/search/codes_ ... t=GameCube
Personally, I would just buy the newest version. There's a decent amount of cheats, and if you want to enter custom cheats, you can just grab an SD Gecko and use it to load the old Action Replay DOL.
Here are some cheap SD Gecko Amazon Links:
https://www.amazon.com/dp/B00BYGH188/
https://www.amazon.com/dp/B01D4A7QNQ/
This is a far cheaper solution than hunting down a Action Replay Max, and you have the added benefit of being able to auto-boot any DOL by renaming it to autoexec.dol and placing it on your SD Card.
In conclusion:
1. Buy newest Action Replay
2. Buy SD Gecko
3. Download the Action Replay 1.14 DOL
4. Rename it to autoexec.dol and put it on a SD Card (2GB or less)
5. Put the SD Gecko in Slot A and a normal Memory Card in Slot B
6. Turn on the GameCube with the new Action Replay disk in, and it will autoboot to the old version of Action Replay