I've never owned a Jeep (and never will because Chrysler screwed me in the '90s), but I get the Jeep thing. I'm a Miata owner and Miata owners are just as passionate as Jeep owners about their vehicles. I'm on my 4th Miata.
As far as the Jeep stuff goes though, Jeep actively and ferociously defends their trademark. Just be careful if you do get into making stuff in that space that you don't refer to them as a Jeep. Jeep has been known to go after small creators.
Speaking of that space and you wanting to design in it, there are others that are in that space:
https://wcpmodels.com/
I would assume you are wanting to design something like what WCP Models did: