I have a 90 esprit se and was also looking to put a new set of wheels on without dropping $4k. I talked to a local wheel shop and they set me up with a set of xxr wheels. Check out the web site, they have some nova style wheels and a few other nice options. I wanted to stick with an older "period correct" look but bigger diameter. I went with the 18 x 9.75" rear and 17 x 8.25 front. The made them in a 5 x 108 pattern with a +20 offset rear which is really close to the v8 nova dimension. Fronts were a + 35 which will require me to go with a 1/2" or 3/4" spacer. All the wheels are 72mm centre bore but they included 60mm hub centric rings. The package ended up at $940 less tires. You'd see them cheaper south of the border. I can msg you back if you are interested in pics and how the fitment worked out. Some people say the xxr wheels are ****, but I've never seen anything real to back that up, just heresay and speculation.
Jeff