This may not be the right place to ask, but I'll ask anyways since this would be the perfect set for this: Would it be possible for Maxkeys to make an ortholinear modifier set alongside the base set? I saw a thread* on reddit a couple weeks ago about this exact topic, but haven't seen any updates so far. I would absolutely love to see some more SA sets for ortho users, and it seems like there's definitely some interest.
*https://www.reddit.com/r/MechanicalKeyboards/comments/73ts8k/icish_maxkey_sa_ortho/
Are the key sizes/profiles ones that already exist for maxkeys? Like are there already keys in the right shape with the wrong legend.
Getting legends changed would conceivably be doable, but custom molds likely costs orders of magnitudes more than legend plates. Same reason there is no iso support. Wherever maxkeys got their molds, they didn't include an iso mold, so someone would have to actually get one made. Legend plates are just a small part of the mold, the expensive part is the rest of the mold, and that part would need to be created for any mold (for example if you wanted a R2 1.25u key, that would be a custom mold, same with an iso enter, etc etc etc). Anything that isn't already in the base kit would likely encounter this problem.
So as long as you just need 1 u keys, it's likely "doable", now if there is enough interest, who knows. The real issue is that's 15 new legends for a very small subset of people. I imagine moq would be hard or the price would be very high.