Replacement patches for Cub Scout uniforms can be ordered online from the Boy Scouts of America's website or purchased in a brick and mortar scout store. All officially licensed Cub Scout patches are available through the stores.
When visiting the online store, click on Cub Scouts, and then navigate to the level of scout in which you are interested: tiger, wolf, bear and webelos. Once a scout level has been indicated, a page displays showing all required and awarded patches. For example, a tiger cub is required to wear a World Scout Crest patch, the 1910 World Scout Crest Ring, unit and den numerals, and a council shoulder patch. Awarded patches include an outdoor activity emblem, a bobcat badge, Cub Scouts adventure loops and a tiger badge.
Additional patches can be found through ScoutStuff.org, which sells all kinds of patches: those required, earned, awarded and designed to commemorate special events or achievements, such as participation in a pinewood derby, summiting a mountain or completing an orienteering activity.
Some patches must be placed in specific locations on a Cub Scout's uniform, while others are left to be placed at the scout's or his den's discretion. Always be sure to check with the troop's leader before placing any patches on a uniform.