Funny enough, I was wondering the same thing last night, so I did a search in
ebay for them. The only thing that came up were pictures of Times Square where there was at one time (late 30s - 40s) a big Pepsi sign (surprising to me, because any pictures of Times Square I have ever seen, it was always a Coke sign):

As to other items, there is nowhere near the same amount of Pepsi stuff as there is Coke stuff out there...it seems that Pepsi didn't really advertise a whole lot. All I've ever been able to find is the odd tray, and for every Pepsi one I've seen, I usually see ten Coke ones to it.