Further options I found online, and an update on quotations I have received:
The Svantek 979 I listed above was quoted as costing about £3930 ex VAT, and comes with the microphone and preamp. That's pretty good going for a class 1 device.
The G.R.A.S. (Denmark) 90AB lab system, which includes some of the audiology test kit one might need to set up a new calibration service (artificial ear, with 1/2" and 1" microphones). ACSoft sell this, and I was quoted about £10,000 ex VAT. G.R.A.S. was founded by Gunnar Rasmussen (once of B&K) and so has a high reputation for quality.
I also found that the same system is available through Campbell Associates, at
www.campbell-associates.co.uk , as is the Norsonic 140 class 1 sound level meter.
The Norsonic 140 (Norway) looks very similar to the meter shown as part of the G.R.A.S. system in their brochures, although G.R.A.S. seem to have "rebadged" it.
All in all, there is way more info out there than I thought! There are still two companies that I hope to hear from soon with quotations.
I hope this all proves helpful to anyone else out there either considering starting or renewing their test equipment. I would still like to hear from anyone who does audio calibration and uses any of these instruments.
