There’s a polish one called jeansonline.pl, they’re pretty decent.
Priced below UK RRP and they have a decent range too.
Other than that, I’ve found that most of the bargain/grey market UK websites tend to have a limited range – typically 501s in stonewash, medium blue and black, but not much else.
BTW, if anyone has managed to find jeans that are sleeker in profile than a nice pair of close fitting 501s, without being tight enough to make you look like a member of Megadeth’s road crew then let me know!