Help with cnc cutout tomorrow at meeting (17th)

If anyone could please Help me with a graduation present tomorrow at the meeting I would greatly appreciate it. I need to cut-out a large letter L that is approximately 3' by 2.5' and 8 inches wide. I have not cut anything on the CNC at all And if anyone happens to have an easy way of getting a standard font / file to help me with tomorrow it would help a ton. We are using it for people to sign at a graduation party this Friday night.