newbie here when it comes to lowrider bikes

Im not totally new to the lowrider lifestyle i have had one lowrider car in the past for several years. But now im getting into the bike aspect of it mainly for my son. He likes bikes alot and thought of this as a good way for him to be able to go to shows with me and get his own trophies and give him some pride for what he's done. My probablem is that im not sure where some good places to buy aftermarket parts. I lve in iowa and as you can imagine theres not to many lowrider bikes in this state. a few but not many. Im just looking forward to all the spent hours with him in my garage wrenching away on his bike and seeing the end result when its all said and done. But i would love to hear any suggestions or comments from you who is reading this and help me out and get started. Also if anyone knows a good car club around eastern iowa let me know. I do know of a few clubs already. well thanks for your time. matt