When I had mine, aftermarket parts were literally difficult and expensive to get... All my 240 parts were JDM. even my tires were Japanese brand. The only stateside parts I had was an INJEN air intake, NOLOGY hotwires and some MSD ignition parts. Reason for the difficulty was that Hondas and Acuras were the "IN" thing at the time, parts galore...this was around 2000, 2001 I believe...The only headache I ever got from my 240 were just electrical issues, NISSAN's Achilles heel...other than that, they are FUN to drive, especially through the mountain passes...
On a side note, I have an S13 with a JDM front end for sale....