Yah I am a newbie too. I have been searching too there is not much you can do to these cars. The most I will do is slap on some 18's, Eibachs (if I can find some) & maybe exhaust. If you want you can check out some of the body kits from Japan. I reposted this from "Falkdesigns" from another thread.
They were made for several years in Japan as Nissan Cedric and Nissan Gloria, same car, different trim level basically......Look for Junction Produce, Wald, Artisan Spirits, Sportec (all Japanese tuners) for body kits, wheels, etc.
Here is the full thread:
zerothread?id=164819
I just did a google search for each company. Honestly I did not see many body kits at all & IMO they looked unapealing. I have not seen one in person though just pictures. I want 03 M45 so bad but I am trying to get rid of my 97 cobra. No luck yet. Good luck getting your M45!!