Maybe before you plunk down $100s or so why not take $1 worth of fiberglass resin and mat and try to fix it? They do crack easily, so will the next one. Maybe you could just put some duct tape on the outside over the fissures or cracks, then fiberglass/resin/hardener/glass the inside
, bolstering up the structure, where it doesn't show, then when set, take off the duct tape and put a bit more resin/hardener on the outside to secure it all. Spray paint
it with plastic white Rustoleum. Like new? Wear a respirator and gloves, the fiberglass shards can eat their way through your skin. Other than that it's easy enough.
Use a plastic welder, which is like a saudering iron for plastic, and some plastic sticks which usually come with it. I once got a $500 2 man canoe for $50 because it had a hole which I fixed with a plastic welder, and is water tight. It's a bit blobby looking but effective, so you may want to try this on the inside too.