I really have nothing to show that has been custom built from the ground up.
You can see a few mods I've released here: http://www.gta4-mods.com/search/CTI55
I've got a high poly model of the part I need redone, I've tried optimizing it with 3ds max with no luck. I just need someone to re-do it in a medium poly format without loosing too much detail. I could do it but it's real curvy.