Trousers like gap bi-stretch skinny ankle

[TickledOnion]

I've got a couple of these but want something different for work. I like a fairly thick non-polyestery fabric, with a bit of stretch. The gap ones fit well but always looks a bit scruffy after a few washes.
I've got big thighs compared to my waist which most shops don't seem to cater for.
Any ideas?

I seem to remember Next doing some bi-stretch trews - so try them? Also I am sure Marks did as well??

H&M do quite nice trousers with a bit of stretch that are £12.99. Not amazing quality but for the price they wash and wear quite well. They're on the website currently but they're the ones with the zip on the side (there are similar ones with a front zip which aren't as good).

H&M and next are usually too tight on my thighs or too loose on my waist. I end up with baggy fabric around my crotch. It's a shame because I like H&Ms variety of patterns and colours. I'll have another look.