Another grant to look at the one from National Instruments, info on it can be found here:
https://decibel.ni.com/content/docs/DOC-30321
You should also contact your regional director or the FIRST Senior Mentor for your area if you have one, they will often have information about local grants as there are many grants that companies and/or states make to teams in their specific area that won't show up on the FIRST grants page.