Thanks if you have more info about the wiring pls let me know. (I have the tiptronic version)Welcome!
If your car is the tiptronic version then I think a RX-8 steering wheel with paddles can be made to work. There will be some custom wiring to get everything to talk to each other but it's probably do-able.
There's no option that I'm aware of for manual cars other than custom machining a complete kit
Good luck!