hi guys,
i found this shop selling vanguard as well. do check it out!

Chua Sang Hing Trading
Blk 250 Tampines St 21 #01-514
Singapore 520250

from what i see, they currently have:
booster box/packs of vol 2 English,
booster packs of vol 1 English,
some vol 5 jap ver left..

asked them and they say will be bringing in more soon