It's a long shot, but I came across this auction listing while doing some research for my aunt. Her husband, Pete Castiglione, played for the Pirates from '47-'53. The auction from December 2006 is for a 1968 Pirates jersey (#5) and for unknown reasons was paired with pants from 1949 which appear to have been worn by my uncle.
In the off chance that anyone here knows the whereabouts of these pants, I'm extremely interested in finding them.
http://www.lelands.com/auction/Aucti...iform-with-Cap
Image from Lelands site.