T&S has an "old" and "new" seat washer, one is grey & soft, the other is white-nylon and rigid. Don't know which one is "new". We use the white in our B107 sprayer and require a supply. 1. Do you know which color is the new and which is the old? 2. whether the Fisher (CHG?) washer will fit & work in T&S? 3. Where we can the white seat washer if it doesn't? Thanks.