I went to Ecol Electric , B& E electronics , no one knew where to get exact replacements or where I might find some , which led to me ordering off of ebay .Have you tried sourcing the contactors locally?
I buy lots of stuff on ebay , usually it's not from China and wait times are reasonable.
Busy Bee should be better at customer service , I'm not sure if or when they will learn this .
I am product loyal and if a store or business treats me well and displays professionalism they earn my loyalty . Piss me off , I go some where else .