Where is the cheapest place to buy a standard 80mm electronic speedo and rev counter from?

I have seen SW ones quite cheap, does anyone know what like the quality is?

you could try lowtension for VDO ones - good prices.They are usually on ebay, based near Birmingham if you don't find them on ebay.
HTH
Colin

Rally Design (Kent)

http://www.raldes.co.uk

How about ETB instruments they were good for me with different colour needles,lights and bezels
try website or 01702 711127
hope this helps
Barrie