WTD: Old style Sound Organisation racks

[Lucerne]

I'm looking for some of the original square "speediframe" racks from Sound Organisation, Preferably 3 or 4 shelf, but anything considered, particularly if still with the connectors to allow stacking.

Ideally close to London, South East, East Midlands.

Wanted in good structural condition but marked/shelf damage not so important as I'll be getting them re-coated.

Thanks

Neil