Ectoplasmic armor is a 5th level PsyWar power that grants a +10 armor bonus. Duration 1 hr/level.
Encode Stone is essentially the psionic version of a scroll.
Cost: power level x manifester level x 25 gp.
Minimum level to manifest is 10th for a Psion, so cost is at least 5x10x25 = 1,250 gp and would last 10 hours.
Greg