I already posted on your thread "New in Town" but here is the info I posted there.
Eureka only built these for two years (85 & 86). There were 38 built in 1985 and 73 built in 1986, so you will not see many around. It started as a complete Pontiac Parisienne that was cut and stretched. The roof, sides, and rear quarters are a one piece fiberglass shell and the loading door is also composite.
I have a 85, pretty nice cars.