All,
Brasseur Electric Trains sells K-Line parts. Over the past several years, I have purchased several K-Line items through Brasseur. Also, I have purchased Lionel parts through Brasseur as well. I have been very with Brasseur's service.
Here's the link to the web site and the direct link to parts landing page:
http://www.traindoctor.com/service/catalog.asp
Also, thank you bob2 for the disassembly instructions. I have the same problem: flying passengers. I want them reseated so my railroad isn't liable for any tort liability. LOL