There is no separate uniform for the Bobcat rank. The regular blue Cub Scout uniform is worn by all Cub Scouts after they have earned their Tiger rank badge or after 1st grade. They should wear it to all den meetings, pack meetings, and special pack activities.
The Bobcat rank should be the first rank earned by any boy joining Cub Scouts whether he is moving up from Tiger Cubs or joining after 1st grade. Once a boy has earned his Tiger Cub rank, he can start on his Bobcat rank. The Bobcat rank in Cub Scouts is similar to the Scout rank in Boy Scouts - it is quick to earn and shows that they boy is now on his way in scouting.
The Bobcat rank badge is worn on the left pocket of the blue Cub Scout uniform above the Tiger Cub rank if one has been earned.

Uniform details, price changes, and other scouting gear is found at ScoutStuff.Org - and you can now purchase online.

Retrieve a list of Scout shops and distributors in your area at this Scout Store Locator

These uniforms are a significant cost for many scouting families. Some possible ways to reduce costs are:
• Have your scout earn his uniform or part of it.(it might last longer, too)
• Purchase only minimum required items in your pack.
• Buy used uniforms on eBay.com or local clothes store.
• Check with your pack or district about a Uniform Exchange where you can pick up or drop off uniforms.

Placement of insignia on the uniform is important. The Uniform Inspection Sheet has insignia placement guides. There is also a Male Leader Uniform Inspection Sheet and a Female Leader Uniform Inspection Sheet.