Fairly easy to be quite honest mate. You have listed alot that I haven't used.. Buy some fiberglass sheeting, some resin, and some hardener. A tub and a paintbrush usually come in handy too! Put a bit of resin into the tub, and a very small ammount of hardener, mix it up with a pensil or something, then use the brush to fiberglass what your fiberglassing. If fixing a cracked lip or something best bet is to fiberglass the inside to strengthen it so it doesn't look all fat at the front. Anyway, guage pods, cut up some guttering tubes up to the size you want it, use your current (or spare?) a pillar plastics, and then somehow attatch them to it, then fiberglass round them. Couple of layers will really give it strength, then some filler to smooth it off etc... its not the biggest thing in the world to be honest. Its a hard process to explain in writing though, so much easier learning it hands on.