Welcome AZToker to the world Of Motorized Bicycles. I too am from Tucson and am fairly new to motorized bicycle as well. I have learned so much from everyone on this site and i know you will too.
If you didnt know Vantics is a motorized bicycle shop here in Tucson
2025 W Ruthrauff Rd. Suite 125
Tucson, AZ 85705
They have all kinds of parts at their shop and can also order pretty much any part you need im pretty sure. They also have done a bunch of trikes as well and im sure if you go in and talk to ed or bill you will learn alot. Check out their site and photo gallery to see some of the trikes. USABikeMotors, Your source for Grubee StarFire Bike Motor Kits, Parts, Service
Hope this helps. If you have any Questions. Just ask!!!