I've been asked by a few people if there was anywhere to download the custom maps other than when connecting. Personally I would suggest allowing TF2 to download when you connect. I have set the server to redirect you to my web site whenever a required file isn't on your client. All of these files (including maps) are compressed to about half size or smaller. The client then expands the files and puts them in the proper place for you. It's very easy, and doesn't take up any resources of the game server. If you still wanna download them manually here's a link, but I'm not including directions, if you want them manually I assume you know where they go.
http://www.mike3d.net/tf/maps/jifmaps.zip ~180MB includes all custom maps currently on the server.
http://www.mike3d.net/tf/maps/ctf_quarry_v2.zip ~23MB This map is in the rotation, so single download for it.