Hi Caleb, how are you?
Click on the left tab>Pictures>Memorabilia. Mind there's 3 pages with some Denim merch, like guitar picks (I have one, a gentle offer by Lawrence himself), Denim patches, pins (another gift by Lawrence) and so on.
Cherry Red staff were selling Go-Kart Mozart and Denim merch back in october (I atended the London show at Moth Club).
I think this isn't official merch, but....