Where to buy double size album cover frames in the UK?

I'm not sure if this is the right forum for this, but I was wondering if anyone knows where to buy those frames for album covers in the UK. I'm actually looking for the double-sized ones, as I have a poster (cover of the Beastie Boys Licensed To Ill album) that is 12" x 24" and this would be a cheap way to frame it. I'm looking for something like the frames on this website:

http://www.albumframes.com/

They only ship to the US, so I was hoping there was somewhere in the UK I could order them from, or even better, buy in person from a brick and mortar in central London. Anyone have any ideas?

 

http://hobbyframes.com/Records.htm ship overseas

 

You'd have to check if these do doubles but they're pretty good as you can easily change the LP cover.
http://www.artvinyl.com/