I have bought a Goodman evaporator core from them once. It was well packed and arrived quickly.
For full systems I use Quality Air Equipment (500 Arapaho Rd. Suite 303 Richardson, TX 75081)(972-514-5000). About $2k for a 2.5 TON complete system. Ed can get you individual parts as well such as evap. core, etc.
Here is his website https://www.quality-air-equipment.com. He also sells on eBay. Please let him know I sent you.
If you are looking for service parts Air Force One (10226 Plano Rd #104, Dallas, TX 75238) or sometimes Grainger.
