Help With Parts

Where are you based, UK or USA, whatever?
You can always make universal parts fit but probably have to rewire etc. There are places in UK you can get used bits from, depends what you want, and there's always ebay.

 

Try Pinwall Cycle? It’s a salvage yard, specializing in motorcycles.

There are plenty of options for aftermarket, universal gauges and instrumentation, but it’s going to likely take someone with some automotive or motorcycle electrical experience to install it and make it work. That would be custom work and mean an Indy shop. It’s doable, but finding someone to help you and sort through what you need vs. a lot of electronic features you may not desire.

There are tons of aftermarket headlamps available and this would be the perfect excuse and time to go LED. Isn’t that a 7” headlamp?

 

https://pinwallcycle.com/

 

https://www.motorcycleid.com/sport-bike/universal-led-headlights/?vehicle=149636

There are lots of inexpensive Chinese knockoffs to choose from, too, and most are actually pretty good. Some even have the turn signals built into the perimeter of the headlamp, and can be had for well under $100