I just did a comprehensive search for pedals. I liked the idea of catalyst pedals but didn't like the price or weight.
The biggest plastic (aka composite, because they're cheaper) pedals I could find otherwise were 120mm long - Kona Wah Wahs and Issi Thump.
I came across several disturbing reports of the Konas breaking, while the Issi got good reviews about it's convex hammock shape. $50 for the replaceable pin version. It's from a big bike parts distributor so should be available locally.
iSSi Thump pedals are composite flat pedals with true concavity for the best grip possible. They are available in a wide range of color options — find yours.
rideissi.com