Exciting, huh?

I'm trying to source a replacement for a toilet seat that's been
broken. The seat itself is nothing out of the ordinary (oval, 345mm x
420mm) but the fixings are stainless steel.
There are no manufacturer's marks, or mould stamps on the seat or the
lid.

Pictures of the fittings he http://allegoric.us/16A5p4E &
http://allegoric.us/16A5qpd

It's highly desirable to replace the seat with an exact match so if
anyone recognises the fixings it will be a great help.

I realise it's _possible_ that the same fixings could be re-used but,
AFAIK, no standards exist that would provide any assurance before
buying a new seat.