I'm looking for an instrument case for the BITX20A 20m transceiver,
the choices in the regular UK outlets don't look too special. What
I'm looking for is something around 6 inches wide, 8 deep and around
3 inches high (150 x 200 x 70 approx). Something with extruded sides
would fit the bill but it has to be all metal.

I'd appreciate any URLs of suppliers in the UK or US, meanwhile back
to googling
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Charlie , I have seen (simple) aluminium enclosures of the approx size
you need at Maplin (Inverness). Including one with a black plasticised
cover. You can finish those yourself with Hammarite paint from a spray can.
Good luck with homebrewing the BITX20A

Frank GM0CSZ / KN6WH