kennef,
RockAuto is good for wear and tear items: brake pads, rotors, axle boots, electrical parts,.....
Check for "Promotions & rebates" on the top right corner of their web page. From time to time, they have even better deals!
On the top left they have sample savings vs. part stores. It is significant on some stuff. Especially the more expensive the item is, you are saving money on tax vs. shipping cost.
Once you select "Honda", "2007", "Fit", "Suspension", "Alignment Kit", and right below it "Alignment Shim".
Spicer is even cheaper. You can get front kit for $10.78! Read specs on each kit. Most adjust for 1 1/4 (1.25) and there are some that can adjust up to 1 3/4 (1.75)!
For the strap, go to Orchard Supply or Home Depot. Just get basic rubber strap with metal hooks at each end. Mine are about 2 feet in length. I can take a picture and post it if you need it.
Glad it helps at least one member!
Ivan