As armor typically doesn't change size and shape with the user unless through a spell, I would suggest using magic items that do changes size (such as bracers, rings, or amulets) or have armor that is fitted particularly for hybrid form. Known monsters are usually thought to be evil and are either common and somewhat accepted and therefore often working for the criminal underground, stay hidden while they operate, or are known members of the Monastary of Redemption (where evil creatures are converted to a neutral or good alignment). If you want to go with the Monastary of Redemption, I can make them a contact for you and your character can walk around entirely in hybrid form along with limiting the concerns of wearing armor. Wereboars are usually neutral creatures and not in need of redemption, but people in Ptolus would probably feel more comfortable if you were a known member or associate of the Monastary.
The big differences in the LA +2 Ptolus version of a lycanthrope and the LA +3 MM version is that the LA +2 version gets an upgrade to Movement (+10 ft a second in hybrid form) and DR (goes from 10/silver to 15/silver), but they lose all their feats (but gain Improved Initiative and Blind-Fight), only gain one additional hit die for being a were-creature (1d8 + hit points from class), and lose their low-light ability. Let me know which version you would prefer.