Can anyone give me some advice on what to use when sending my motherboard in for repairs to Asus?

I plan on buying some anti static bags, but I'm mainly worried about what I should use to cover the CPU socket pins and what type of padding I should use to ensure it doesn't move around at all during shipping. Unfrotunately, I have the original box the mobo came in but none of the other packaging such as the anti static bag or cpu socket cover.

Some advice on this would really be appreciated, this is my first time having to send something into Asus for an RMA.