I'm trying to source fabric similar to that used in E9 trousers (95-7% cotton, 3-5% elastane, bright colour, no pattern), it needs to be lightweight, in a sort of summer trousers type of way, but not so light that you can see through it or it tears the first time you sit on a rock.
I'm aware this stuff won't be particularly rugged and trousers made from it will be subject to repair/replacement but it's what I really like to wear.
I'm having trouble finding anything. Is selling fabric online not really a thing? It seems like even most of the top results google gives me have a relatively small selection of stuff that is even close to looking suitable (I found a few results on myfabrics.co.uk and ordered samples). Does anyone do this sort of thing as like a job or hobby or something and could give any advice on where to go?