Help getting Express Pass for 2/27?!

Does anyone have any tips to help us secure an Express Pass for tomorrow, Feb 27, at Epic Universe? It’s my son’s 9th birthday, his first time at Universal, and based on our experiences so far, I’m worried about ride wait times. We only have one day where we can go to Epic, and I want to make sure he’s able to do all the rides. I know it’s a long shot, but any tips or tricks would be appreciated. Thanks in advance!