Surely the costs would be far greater than the license alone anyway. I doubt that Eric, or whoever, would want to do a half-assed inaccurate version of the ring if they'd gone to the trouble of securing a license for it. So that's going to take time, and if it were a one man (Eric) job, it would take a lot of time. Time, as they say, is money.
I guess it comes down to how many extra licenses they'd sell. Probably a lot, but only if it was as good as, or better than, any other version out there. The more you invest in making it perfect, the more license sales need to result directly from that investment for it to be worth it.