Well these 3 sites seem to be recommended, however not a single one of them seems to use wooden staircases and glass steps.
It's always metal staircase, glass steps, OR wooden staircase/steps, glass panels.
These 3 come up in an article I read about installing glass steps, where the woman went onto explain that this type of work might require an architect, but obviously that would cost a lot more money.
http://www.spiralstairs.co.uk/domestic_special.htm Not relevant, but they do custom work and I have seen a "relatively" straight staircase in their images
http://www.culmax.co.uk/ Another UK based company that can do custom work, but they seem to only deal with metal & glass.
http://www.preedyglass.com/serv.html This seems like the best one, as they do glass staircases, and there are a number of images showing glass panels inset into a wooden floor. However this wouldn't be an all in one solution (which narf I don't think you will find).
Personally I would get a good carpenter in to price up making a wooden staircase (with just edges for the steps to sit on) and then speak to the 3rd option above to find out if they can make thick glass to the custom size you require (which it looks like they do).
How would the steps fix to the wood? Is there a reason wooden staircases never have glass steps?
Other than the obvious glass+metal = shiney/modern could it be some kind of building regulation that doesn't allow glass steps on wooden staircases due to the wood being able to expand, move, settle etc....?
Good luck, I'll have a little bit more fo a look, but I doubt very much if I can find anything that would warrant a tenner
