I know you're all a fashionable bunch. Uni-qlo have a few t-shirts with prints for Capitol's 75th anniversary. If you're worried about the price, the do sell them off cheaper after a little while. The quality is very good.
https://www.uniqlo.com/uk/en/men/ut-graphic-print-tops/capitol-75th
https://www.uniqlo.com/uk/en/men/ut-graphic-print-tops/capitol-75th