X-Post from reddit, but looking for 4 tickets for Sunday March 29th to LCS. Please help!

So I live in AZ, but my little brother lives in CA. I havent ever been able to go to LCS and me and him have always wanted to go. Long story short, I have my 2 best friends and little brother (who doesn't even know I'm going home) trying to go to LCS. I was wondering where I could possibly get 4 tickets to LCS, because they have been sold out. I havent been able to go home in almost a year and with work it always has to be spur of the moment trip if work actually allows me to travel. I was wondering if there is anywhere or anyone willing to sell tickets, because I really want to surprise him and with Sunday being the only option I was really hoping to take him. Anyone have any recommendations of where to find tickets?