There's a guy on here who is collecting records of all AVOs worldwide.
UK Vintage Radio Repair and Restoration Discussion Forum
Too much chat is discouraged on the forum because there are not many mods. They have a Face-b thread now and show pictures of AVOs I never dreamed existed.
Last time home I sold dozens of unused movements for the VCM 163 valve (tube) tester which I happened to have in storage. They were however, made in Italy, and not of the supreme quality of the AVO 8's movement. All seems so labor-intensive now and indeed, that's why the meter is no longer made.
Just making the spring was a work of dedication, a bit like hand-painting the line on the side of Rolls Royce cars.
Rapid Electronics in Colchester were I believe, selling them until the end.