Kitchen cabinet hinges - negative angle

I have had to have a kitchen corner cabinet re-built to give proper access to a new central heating boiler. A capenter took out the ill fitting cabinet and put in shelving instead, but when it was done, we realised the new shelving unit would actully look really well if there was a door on it - I have a spare door. The shelving is at an angel of 45 degrees to the wall, so to fit a door, we would need a hinge which would close to an angle of 45 instead of the usual 90 degrees. The opening angle could be anywhere betweeen about 110 and 180 degrees. I know that such hinges exist, as I've seen them on US web sites, but has anyone any idea where I might get one nearer to home, which is Dublin?