Hi Alan.

I think the best place to get an answer is here:

http://en.community.dell.com/support-forums/desktop/f/3514.aspx?pi21544=1

Let any of DeLL RockStar; shesagordie, SpeedStep, or any other give you advice. They have been trying and buying DeLL equipments and parts for years. They can give you directions of any original or replacement parts for your comp needs.

Good luck