The question looks to be too specific to one item. It may be a long time till anyone with that specific item comes along. However general knowledge is out there for the taking. That being said, for years I've fitted filters in place when no exact match can be had with painter's tape. There are a lot of folk new to this that don't accept old school workarounds.

For example http://forums.popphoto.com/archive/index.php/t-494242.html
Bob