Tammy, you can check with the following,
Prairie Fire Press - They have a CD eith 200 different Bus Flyers that can be edited for your own use with your bus ministry, plus ideas for songs & inexspensive promotions. Visit them at http://www.21tnt.com/cd. It is a ministry of Arnold Baptist Tabernacle, Arnold, Mo.
The Soulwinng Bus Ministry, By Dave Smith. You can call or write them at Trinity Baptist Church, 800 Hammond Blvd., Jacksonville, FL 32221, (904) 596-2408. This excellant booklet has half pages flyers and hundreds of ideas for promotions.
You can also visit their web site listed under the Soulwinng Bus Ministry.
Visit www.bringthemin.com for some ideas. plus if you will get thier quartely mag. you can get a lot of good ideas.
These are some people & places that have helped me, you may already know of these. But if not check them out. God bless your ministry! Brother Rick Hilton