Well, looks like the 40 is going to be what's available for a reasonable price. I've looked though where did you find this price? I can only find 120.95 on dells site. Is there a coupon or something I need?

http://accessories.us.dell.com/sna/productlisting.aspx?c=us&l=en&s=dhs&cs=19&category_id=5087

Thanks