Containers for Rollei Bay II filters?

Hi Everyone, I use Bayonet II (BII) filters with my Rolleiflex 3.5E. In what containers can I hold these little filters in the field? The old leather cases are torn and ratty. Once upon a time, I had one of the little suitcase trunk boxes for BII filters and a hood, but it is gone. Any suggestions? Thanks!

You might contact Tim at filterfind to see if he has any cases. Do a quick measurement of the diameter of the filters so he can quickly translate to mm filter size.