I just bought a used Ilford Safelight with a 5X7 inch red (912 I think) filter in it. I would rather it had a fresh filter for Multigrade. A 5X7 Kodak OC Filter is close to 100 dollars. I don't see Ilford filters advertised, and I understand they were made by an Outside supplier. Are there any Suggestions. I am in Canada if that makes a difference.