I need a pair of black bootleg trousers, preferably with a bit of lycra, & not with a 'pouch' but elasticated back with adjustable buttons or some such thing... has anyone seen anything like this in the shops? I am about to burst out of my normal trusty black trews but am too small as yet for my pouchy ones from last time. I'd rather not spend a fortune. I live in london, so access to shops not a problem. Thanks in advance