personally, i'd find it easier to take the sketch, then have someone else fabricate it. like a fiberglass mold shop or something. the price is kinda steep but not that bad and you get a professional job done and also if you order more than one kit you keep the molds and sell the others to recoup some of the cost. you can contact Mark's Custom Kits at markscustomkits.com (they make show car quality working replicas of the Knight Rider car). They can make custom kits for just about any car, the only thing tho is the turn around time, could be weeks or even months for them to develop your sketch and design the thing.