fibre glassing isnt hard, well, its do-able. you could give it a go yourself? the fibre glassing that is. just make a nice mould out of foam or something and make 4 flares that are identical. or make 2 moulds, back and front...
dont know about the cutting etc.. but about the cert, not 100% but there is a site, ask WDE BDY , but my front guards aren't considdered structural and can do anythingt i like with them (including giant rust holes)
ring around.