dragon magazine 330, class acts article, page 90.
gives three alternate martial art styles which swaps out weapon proficiencies:
all of these options lose the following weapon proficiencies (and the ability to use them as special monk weapons):
*lose - kama, nunchaku, sai, shuriken, siangham.
ghurka:
*gain - kukri, short sword, and short bow.
*special monk weapons - kukri, shortsword, club.
arnis/kali/escrima:
*gain - short sword, longsword, and whip.
*special monk weapons - club, dagger, quarterstaff, short sword.
krabi-krabong:
*gain - short sword, spear, short spear, all shields except tower.
*special monk weapons - short sword, spear, short spear, club, quarterstaff.