I'm in the same boat, brian. My nose mask works great on road trip, but doesn't cover the light covers. At 110,000 I'm beginning to see the wear.
(I will say, I popped them out, I think last summer, and cleaned the inside...what a difference!...they had gotten a flim on the inside over time...I just used a mild soap and water and was careful not to scratch them from the inside.)
I think we'll just have to plan on putting in new covers at some point.