NNG Looking for AT&SF caboose

Pueblo Railway Museum officials would like to have an AT&SF caboose to help complete its collection of cabooses on railroads that once served Pueblo. Current cabooses in the colection represent the Colorado & Southern, Denver & Rio Grande Western, Colorado & Wyoming and Missouri Pacific railroads.
Also missing are Rock Island and Colorado-Kansas cabooses. The Colorado-Kansas was a short line that ran to Stone City, northwest of Pueblo, until the 1950s. I know nothing of their cabooses or even if they had one they could have called their own.
The Rock Island left in the 1920s.
Leads on any other cabooses also will be appreciated.
As usual the Pueblo Railway Museum isn't made of money so the cabooses would need to be acquired with a minimum of expense. Payment through grants is a possibility.
~~crossposted on other sites.~~~