Got mine from Loot Crate about 2 years ago. Just did a search on Amazon for "Marty McPrime shirt" and it came up also. Link is: https://www.amazon.com/dp/B07X4819DC/ref=cm_sw_r_other_apa_i_BRW7DbPE6NGVE

Or just do an amazon search like I did if you don't want to click the link. Warning tho, I know NOTHING about that seller so make sure you check Amazon guarsntees before buying from them.