There should be plates and whatnot throughout the car, and not just one single ID plate. I looked into a slightly modified EA SVO (red on black, manual, MPFI) for about $6000 (in a dealership), but the condition was pretty crap bodywise, so $8K may be ok for a very well looked after car. There are markings (stickers or plates can't remember) on some suspension components that will help identify it, as most people who build a replica wouldn't go to such detail. I'm sorry i can't tell you exactly where to look but it's been ages since i researched these cars, but i hope at least it's a start for you.
I can tell you a few details of them just off the top of my head incase you don't ring Mick Webb:
Standard they have - momo (or similar
) steering wheel and seats, dark grey 16x8 svo wheels, lip spoiler, two-tone paintjob (although i have seen single color examples, maybe reprayed tho), mild bodykit, MPFI motor and manual transmissions (none are auto AFAIK
). They come with SVO extractors and "free-er flowing" exhaust. They have lower and much stiffer suspension also.
The car i looked at had electric thermos, and a pod style filter that looked almost factory, but i'm pretty sure these were done by the previous owner.
Hope that helps a little bit,