It shouldn't be terribly hard to do. A menu like this:

Please choose your multitool functions:

1. Pliers: a. Needlenose b. standard c. shears
2. Left side slot 1
3. Left side slot 2
etc.

Then the factory assembles the tool, and you pay an extra $50 or so for a "custom" multitool. Assuming they had the tools I'd want, I'd jump on something like this.