Page 47, Mage Armor should read:
Mage Armor
Create Force 2/Gen 1
Total MP: 2
Range: Touch
Duration: Ten minutes
Mage Armor
Create Force 1/Gen 1
Total MP: 2
Range: Touch
Duration: Ten minutes
You encase the target in an invisible masterwork chain shirt, granting a +4 armor bonus. Though this chain shirt is weightless, if the bearer does not have Light Armor Proficiency, he suffers the normal arcane spell failure and other armor penalties. Costs: 2 MP elemental object, 1 MP duration. Note that though a masterwork chain shirt is not the most expensive armor available for 2 MP (250 gp out of a possible 500 gp), it is more likely to be useful to spellcasters than heavier armors such as banded mail.
and Mage Plate should read:
Mage Plate
Create Force 3/Gen 1
Total MP: 4
Range: Touch
Duration: Ten minutes
You encase the target in an invisible suit of masterwork plate armor, granting a +8 armor bonus, or in the force equivalent of a mithral shirt, granting a +4 bonus but with much lighter penalties and requirements. As above, though, the wearer gains little benefit if he is not proficient in the armor. Costs: 2 MP elemental object, 1 MP extra for gear cost, 1 MP duration.
Note that both masterwork full plate (1650 gp) and a mithral shirt (1100 gp) cost less than the gp limit (2500 gp). You could choose other armor types, but these are the best. Alternately, in place of the 1 MP spent to reach the necessary cost, you could use Create Air 1 to fill the armor with sweet scents, Create Light 1 to have it glow, etc.