Don't think it will help but I have an NA2 unit sat on the shelf, fully overhauled by NSX Rack repair with Plus package and never even opened (it's a long story...). 53601-SL0-040. It won't be cheap though, and I'd only be interested in an outright sale as your rack isn't compatible with my car. Lings seem to have a new one for your car available but nearly £10k.
Just in case mine might work, Simon (NSXGB) was selling an 03 steering controller, so you might be able to fix something up and upgrade to NA2 steering but caveat emptor.
Daily driver: Jaguar iPace HSE
2000 NSX Coupe, Circuit Blue, was W2NSX now V6NSX
Renault Megane RS Trophy R
Other interesting mode of transport: Bell JetRanger