I ended up googling the gigavac200pa-1 and saw a website called tti.com selling them for around 100 each. I might pull the trigger on that. Another option looks to be to take those part numbers 1004747-00-B and 1004750-00-B to tesla and see if I could get the contactors from them. I also read that Gigavac might be the supplier for tesla so I might be getting the same if I find a way to go through the dealer? I read that you need a Tesla Vin to get parts?
Different Tesla parts have different restrictions. Many are "Over the Counter" and those don't need a VIN. However, I did a quick search at epc.tesla.com and found that Model S contactors that visually look like the Gigavac units do require a VIN to purchase.