ur best bet aren't the big commercial stores, its always the smaller shops around the US. i bought my stuff from guitar den. some folks have recommended other shops if u'll search aroudn the site. even so-called items that cannot be shipped by the larger stores (e.g fender parts/guitars), the smaller stores will ship to you. acme guitarworks, magdon music, amongst others that will ship stuff to sg. at reasonable shipping pirces, they dun make a lot off shipping.
by comparison, i would have paid USD$45 for shipping at muisc123.com whereas i only paid USD$25 for shipping at the store i evetually ordered from. cheers