i think the futaba 3pdf fits ur bill,...
ur budget mayb able 2 get the ex1-mars,but remember tat it does not come with any servos...
as 4 the jr xr3,i have no idea where u can get it in s'pore,but i understand frm my LHS in J.B tat i can order frm him...
in s'pore veri hard 2 find,...cos i tried b4...