There should be 5 or 6 of the standard Yam ones on each side, running right up the side and around the front of the infill panels, but no harm in using a couple of extra ones. You could use any bit of sticky-back foam really, but Yam ones are only a few pence each. Stick them on the panel itself to avoid guessing where it'll sit if you put them on the inside of the top cowl itself. The outer edge of the panels turns down, that's where they go.