I found this place:

https://www.trenddirectuk.com/

(sorry Mc - UK based)

They seem to have good stock and decent prices.

That particular bit is just under a tenner+plus VAT.

Any tips for routing? My idea was to use piece ply that I can clamp across the top of the body to protect it and give the router something more stable move over. I think I also need to fill the gap at the front of the neck pocket so the guide has something to roll over?

Oh and lots of practice too....