I've just had excellent service from A Gagg & sons, I had a terrible Triumph speedo, they took it in and rebuilt it to Ariel spec for £177, all within a week. Complete with trip and bracket.
please note the web site has the wrong address, they now only do speedo repairs and speedo cable
A Gagg & Sons
Phone: 0115 978 6288
Unit C21a Byron Court
Byron Industrial Estate
'27 Model C, 30 Model F, 39 VG,39 VB,50 VB rigid/tele,52 VH,58VH
,, ,and lots of parts,