Unresolved

Chassis supplier

Can anyone help please, I am a chassis manufacturer with 0 customers, it appears that I'm not a customer? I can't join another manufacturer to buy a chassis and when I click on supply of my chassis it isn't highlighted, meaning I can't be a customer?. 
Or any advice on who to contact, Tia 

Guess it is the same like with the engine. You can‘t ever become a customer (again) after the decision to be a manufacturer. Wish it was different in both cases.