Hey Mike -
Peter Dyson has a large assortment of oil bottles, along with more wonderful dusty old ephemera than you can shake a stick at. Wonderful website to browse:

http://www.peterdyson.co.uk/acatalog/OIL_BOTTLES.html

Joseph Brazier has an oil bottle - it's not what you're looking for, but they have TONS of other things, some of which might occasionally be useful. He makes a lot of what goes into the London gun trade including actions, etc. He could make anything you wanted I'm sure.

http://www.josephbrazier.com/browse.php?view=PARTS

Cheers
Ryan