Looking for a glass container replacement (to hold butter) for an antique (ish), silver plated (no makers mark) butter dish base and lid.

It has a lobster on top of the handle and the size of the internal base is, 10.5cm in width and 12.5cm in length. The lid's internal measurement's are 8cm in width and 9.5cm in length.

Bought in Megan's on Kings Road in London, who have said the item came from France.

Can anyone help? Actual image of dish below.