For my AS level D&T project I'm making a chair for my railway in the garage and I thought "someone is bound to have thought of this before me, I'll google it." Nothing, not a single chair (well pway dept chairs)! Does everyone just use office chairs ?
I use late mum-in-law's perching stool. The kind of thing old people have in kitchen which is just below working surface height with sloping seat and lumbar support. Combine that with eg driver's seat and you'd have a winner