Academy sells some jointed flat fenders that will bend ninety degrees. I bought a pair for my skiff and affixed lines cut to length and attached clips. They clip right on to the poling platform and a D ring on the bulkhead at the front of the cockpit.
I don’t recall the brand, and my boat is in the shop so I can’t look at them. Perhaps Attwood? They work really well.
I like flat fenders since they don't roll. They also sell bass boat style fenders that are the inflatable type and have the top bent over. You might look at jet ski fenders as well. They slide over the rub rails.