You should still do something similar but with your own twist on it for the models with no center console in my opinion. It would be nice to have an option that is made by a fellow mud member and is already stateside so people dont have to pay shipping from australia on top of the already spendy price they charge for those consoles. Supporting a small business here in the US doesn't hurt the cause either.
Also, if the reasoning behind not making cupholders for the bench seat models is because someone already makes them..... that same company makes multiple options for the center console models as well but that shouldnt stop you. Instead I say include as many options for different models as you can. 70 series are coming into the US more and more frequently and I bet your orders will fill quickly!
Disclaimer: Extremely biased opinion since I will be wanting cupholders for a bench seat model 70 series soon and would love to avoid shipping from the other side of the globe hahaha