OLP Tony Levin - truss rod adjuster replacement?

[tauzero]

A little while ago, I got an OLP Tony Levin. There's a little too much relief on the neck so I decided to adjust it.

 

Being an Allen key adjustment kinda guy, I hadn't paid attention to the truss rod adjuster. Thinking it was an allen key adjustment, I moved the scratchplate to try and get access to the adjuster, but after some struggling and a bit of research on the interwebs, it became obvious that it's a spoke wheel adjuster. Is it possible to get a spoke wheel adjuster that will fit onto the current truss rod, or am I looking at a replacement truss rod or neck?

Edited 8 hours ago by tauzero
Changed title to be more accurate

[tauzero]

I decided to take the bull by the horns and remove the neck, in the hope that I would put it back together within ten years.

 

A 4mm allen key is the right fit for the truss rod end, which is inaccessible with the neck on, so I looked for a spoke wheel adaptor. There was one mentioned on here but it was from the EU (guitarsandwoods.com) and with shipping it came to about £40. More hunting produced one from Grainger Guitar Parts for £8 all in, so that's now ordered.