The K&B car is not too easy to find, so as a source for hubs it's not real likely. The car you want to build is a neat old slot car, it's not a rare, hard to find car. There are a lot of options on how to detail and build your car. You really don't have to go by the book, you can make it the way you like. Hubs are one example, You can make resin bat hubs, you can paint knockoffs red or red and black.
You can find all kind of bat logos on the net and many of them look 100% better than the red sticker BZ used. Try making some hubs and see what you come up with. You might surprise yourself. Certain of the Batmobile model kits had a 1/24 Batman in them and I used him for a driver in a Classic repro I did a few years ago.
Bottom line is make a fun car you like looking at. A MIB BZ Batmobile is a collectable piece and worth being careful with and taking care of. Most built up cars are just old slot cars so have fun with it. 10-15 years nobody will much care or even know if your car is an original clone.