If it's a functional part I suggest to choose PETG instead of PLA, as the layer bonding is stronger with PETG. Also if you let me know in a comment if it's a functional print I can optimize for that. A short description of the purpose of the item is useful for optimization too.
I also support multi-color printing. If you're interested please contact me, as setting things up are a bit more involved, and not everything is possible.
Also I can print in additional colors, but delivery will be up to one week.