You can do a search using the words KIT BOX, also check the PIGEON FOR SPORT section, in the PERFORMING BREED forum.
Here is one thread:
http://www.pigeons.biz/forums/f38/my-kit-box-29676.html
and another...
http://www.pigeons.biz/forums/f38/my-first-kit-box-35573.html?highlight=boxes
Here is one thread:
http://www.pigeons.biz/forums/f38/my-kit-box-29676.html
and another...
http://www.pigeons.biz/forums/f38/my-first-kit-box-35573.html?highlight=boxes