Hi David
Welcome to the wonderful world of FIRST.
You can make your own decals. There is a self adhesive sheet (can't remember name) you can buy that will fit into your printer so you can make your own.
Just go to your sponsors website , find a good logo (or get a good logo from your sponsor. jpeg, bmp etc) and print it off on the sheets.
Hope you have good first year.

__________________
We Build Robots and Careers
World's - #1 seeded in Archimedes, WON Archimedes and made it to Einstein
2016 NC District - Guilford County. #13 seeded, Finalist. Won Quality award.
IN District - Tippecanoe. #4 seeded. Won Innovation in Control award.
IN District - Perry Meridian. #3 seeded. Finalist. Won Excellence in Engineering award.
IN District - State Championship. #1 seeded. Finalist. Won Excellence inn Engineering award.