First post

I've built myself some controls, if interested see the pic here:
http://users.aber.ac.uk/jqh1/arcade/1.jpgSince I mostly play games that're taller than they are wide (pacman et al) and this is a TFT monitor, it sesems a good idea to get a pivot stand for it.
Problem is, all pivot stands I've had in the past have been TERRIBLE - an awkward, stiff pivot which takes some wrestling and then suddenly gives way, moving 15 degrees more than you intended.
Does anyone know of a good stand? For a quick game I should be able to switch between portrait/landscape in about a second, the pivot should be smooth and click into place at 90 degree intervals.
Or could one be made...?
Ps, I'm in the UK, but can import from elsewhere if it's the only way.
Jim