Newbie Question re Oil Filler Breather Cap

My 64 breather was deteriorating and bits of the media was falling out.

In the short term I'm running a new tall chrome one found at a swap meet, could've been Mopar Nats. Tony Dagostino was reproducing them for Hemi engines ($$$) and I rummaged through his seconds and bought it for like half price.

Long term I was going to try repacking my original with copper or brass wool but it's far down on my to-do list.