Where do I find models for various common op amps for use in LTSpice
The LTSpice Yahoo group is the place to go. You can download models of many common devices.

Also keep in mind that while models of real op-amps are pretty good, they are far from perfect, and may not simulate all the parasitics in a real circuit. If you are very concerned about parasitics, there's little you can do other than building the circuit and measuring.