A82 Supplemental

ve4grm has a pretty good set of answers. In addition:

Disrupting Weapon is indeed in Dragon Magazine Annual.

Without gaining an implement via multiclassing or theme, there are several deity specific feats to allow weapons to be used as implements for divine powers (but they aren't holy symbols):

Symbol of the Sonnlinor (Dragon 385, must worship Moradin) gives proficiency in all military hammers, picks, and axes, and allows those weapon types as implements for divine powers.

Moonbow Dedicate (Dragon 386, must worship Sehanine) gives shortbow proficiency, shortbows as implements for divine and arcane powers, and a +1/2/3 feat bonus to damage with shortbows.