I’ll leave a few ideas here on how to “get” this model:
“Ask the owner politely” — this is a terrible idea with a high chance of failing (probably many have already tried this without success), but if you say it’s for artistic purposes—to promote your OC on social media and gain visibility alongside the modeler—maybe, just maybe, he or she will agree. (Keep in mind that for this to work, your art or render needs to be eye-catching.)
“Commission the modeler” is a very simple, efficient idea, but also the most expensive… depending on where you live. Of course, the modeler will have a policy against selling or recreating someone else’s OC… So think carefully about how you’ll place this commission… after all, if the commission is identical to the OC, you’ll be blacklisted.
“Become a modeler”—this is undoubtedly the hardest and probably the most exhausting way to get this OC, and perhaps any OC out there. It’s a flexible approach—after all, as a modeler, the options are endless since every piece of art and rendering becomes material for creation.
“Wait for the dream to come true”.... Do I even need to say anything? (by the way a bump)
“Be a God-Level Hacker” XD
“Circle of Artists or Animators.” Yeah, it’s an idea… many artists and animators know each other or are friends; after all, the OC’s owner commissions work from them. But among them, there might be a friend of yours who has the model… so maybe if you ask nicely, who knows?