I'm very interested in the message 'Sendust Core (American MAGNETICS and Korea CSC)' on the China Supplier

Hi there,
My name is Javid. I am R&D head of Tavan Bakhtar Co., an active company in western iran. We are currently developing a new generation of welding machines. In our research we need the following models of your Sendust Toroidal Cores:
CS-571090 or 77194-A7------> Required Quantity: 10
CS-467090 or 77442-A7------> Required Quantity: 15
CS-400090 or 77258-A7------> Required Quantity: 15
Because of the nature of our work which is R&D based, our current need is limited. Surely, after developing our product our needs will be in wholesale scale. I want to know if the above models are active in your production line and what  are the prices in the mentioned quantity.
Best Regards,
Javid,
Tavan Bakhtar Co.