ChuforiaGraffix.com sells very high quality vinyl stripes as well as hundreds of other custom graphics.
A word of caution: the curves and contours of the Elise/Exige require a great deal of skill to get a professional results. (Skills I thought I had but ultimately learned I did NOT).
If I were to do it all over, I'd buy the kit from Chuforia and have them professionally applied locally.
2006 Ardent Red Elise
Touring, Star Shield, hard top, remote V1 display and bracket, sun visor delete, micro mirror, shifter fix, Stage II exhaust, de-snorkeled, ITG air filter, Nautilus horn, black LSS wheels, ARP wheel studs, upgraded oil line fittings, ProAlloy radiator, s.s.brake lines, BOE Race Links, Innovative rear motor mount, plastic grills out, all aluminum mesh, Total Oil Control Wet Sump V1.1, s.s. caliper pistons, BWR sway bar, Penske NA coilovers.