New stove glass – where from?

I need a new stove glass.

Don’t know the brand of stove so will have to be a custom cut.

There is a big difference in prices, getting quoted from £43 up to about £90.

This is for a 330 x 292 x 4 mm glass.

Are all created equal or should I spend a bit more?

Long shot, but check for a stove data plate (near stove or potentially near consumer unit). I randomly came across mine when resetting a fuse and it gave me the model details and the flue diameter etc.