Who makes the gravy separators with little slots?

I've got an old cheapie one which is falling apart but I can't get another one like it and I can't now remember where I bought it. It's just a little plastic jug with a slot in front of the pouring lip into which you slide a flat piece of plastic which you can raise and lower as you pour out the gravy leaving the fat on the top. Lakeland and Cleaneze sell larger jugs with a pouring spout at the bottom - but they aren't the ones I want. Anyone got any ideas? Thanks a lot.