Over the years I have invested in the Lee filter system so I can use this from 35mm up to 4x5.

Now I’m looking for a warming filter 81C, but it seems that Lee does not makes this filter anymore.
As I have started to use Kodak Ektachrome E100 from time to time this filter would temper the blue.

Does anyone knows a filter from a different brand that will fit in the Lee 100mm holder, and is about the same warming ?