Extra 2018 poster/other merch?

Hi! After seeing Regina Spektor’s amazing set and walking back to our car, I got down on one knee in the muddy parking lot and asked my boyfriend to marry me. HE SAID YES!!! We’re getting married in 2020.

I would love to surprise him (again) with a poster or some other festival merch to commemorate a day that will forever be special to us. Any suggestions?