"trying to find a wifi card
protective plastic cover for the screen
a case"
Can't help with the wifi card, you could get a x50v. Just kidding.
for the screen I recomend
BoxWave either the crystal or anti-glare are good.
And for a case, I use the
RhinoSkin hard case.
Good Luck!
Adam
PS - you will have a hard time finding anything for Dell products in any stores. :realmad: