The options I have found so far are:

1. Librands: http://www.librands.co.uk/products/rollbar.htm

Quoted £711 for parts, at least, and plus VAT on top
Fitting "11 hours" so dependent on rate could easily be £600+

2. Libra motive: http://www.redspy.co.uk/libramotive/jsp/libra.jsp?lnk=502

Parts £695, fitting £660, all plus VAT

3. Simmonds: http://simmonds.uk.com/product_ssteel_removrallbar.htm

£1400 plus VAT fitted

Now I know my head is valuable, but this is a lot of money. The Libra motive page refers to "stripping out all the interior". In my case, if I was going to do it, I would probably consider replacing vinyl trim with leather at the same time.

Is anyone aware of other options? Has anyone had one of these installed?

Nigel