Parrying Shield( Lords of Madness, p. 181)
You have studied advanced techniques for battling foes whose attacks normally bypass armor. You use your shield to block or deflect rays and other touch attacks.
Shield Proficiency (PH) ,
You gain your shield bonus (and the shield's enhancement bonus, if any) as an addition to your touch AC.
A fighter can select Parrying Shield as one of his fighter bonus feats (see Player's Handbook page 38).