Markettimer,
McMaster-Carr calls them Quick Disconnect Terminals, female, size .110 inch tab width, .20 inch tab thickness, in two wire sizes, 22-18 and 16-14 AWG. Look in their online catalog under "Lighting and Electrical." They also sell crimping tools and heat-shrink tubing -- see below.
You are right to insist on the correct size as there have been reports of overheating (scorching of carpet, etc.) caused by ones that were too loose. These are an exact fit for FasTrack.
These fit very tightly. I bought the uninsulated type and use heat-shrink tube insulation where necessary. Sold in bags of 10 or a 100. Very prompt shipping.
Soldering is good too, as long as you don't melt the nearby plastic, or get a "cold" solder joint trying to avoid it.
http://www.mcmaster.com/