NutLoose, thanks for those links I will try fishing there and see what I can find.
Yes, looked at both those companies; Everett were extremely helpful in giving advice and asking around on my behalf. I bought at least one of my items from Jet Art.
There is a Radar Display Unit available online, but not cheap; two sold cheaper in the past on eBay (doesn't mean they will be that cheap again) but I am hanging on to my pennies in the hope I can get a stick top and maybe one other instrument instead.
I did find a stick top and agree a price with another company but it fell through at the last minute. I guess that is how it is when fishing; you think you are just about to land a catch when it wriggles off the hook.
Thanks again for those web links, I didn't know about those.