Great news, bois!
This post comes with new, upcoming UK website www.tomboi-uk.com/ attached to it.
That's right, FINALLY a clothing website dedicated to boyish lesbians.
Part of tomboi's mission statement is to provide comfortable, unique clothes for lesbians who prefer a more boyish look.
The company is pretty new, so there aren't a wide range of stuff there yet, but what they have so far is good a start as any.
Available on the website are tops, (which are suitably matched to specific 'L Word' characters) bottoms and accessories, including a range of super gay belt buckles. Again, stock is quite limited because the site is quite fresh, but you can sign up to their mailing list quickly and easily that will update you on any new stock they receive.
Good luck and happy shopping!