Yes it can be done but it's not worth the engineering effort to make that many. I could make them in a variety of lengths intended to target a specific RPM but I think it would be of more value to offer a complete solution that works. IE "use this intake with the V4 head on the GTS, such and such pipe, and Xg rollers"
Before making it available I want to run it on a real dyno to quantify the improvement. I also want to see how well the nylon holds up.
I think it is amazing you could do it all, even if you went with "matched" parts. Makes more sense that way.
Just the business model would be staggering. I pay you to custom design a part for me and it gets made as a one off and shipped to me... stunning.
If, as Jess says, things can be printed in SS, you could make some very interesting custom parts for a scooter.
Not just performance parts, but functional/cosmetic parts as well.