that exhaust isnt that expensive, i found a few nice systems for the 929 from Aimgain site for only 480$ which is a dam good price. The stuff is very expensive. but there are some stuff that is ridiculious and worth the price. 3 piece work/Jp wheels are expensive as hell of course, but than u have a JP sunvisor kit, or s grill for 800$...which is totally outrageous...(to me) but if you got it you got it. And not everything on those cars can be bought, ive learned from talikin to alot of people overseas that most is all custom and from their own ideas. which i love! but you still need bread.. ive been searching for the longest for bippu parts for my 929, ive found alot of things thanks to countless emails, and overseas forums.. but with the lexus/infiniti its alot easier available. And i have also found that the Vip bug has hit Australia/Europe pretty hard too, and they have alot of shit we dont have. And its alot easier to communicate with them.
You might want to see if that ls your lookin at has the factory air suspension, b/c if it does you wont even need a full bag system, you will just need a controller to manipulate the factory air struts. Which are at most 500$...
Try these sites
http://www.aimgain.net/products/index.html
http://www.memoryfab.com/
http://www.ooparts-international.co....jic/index.html <Jic coils
http://www.japanparts.com/ < they helped me find a set of discountinued springs! great service!