House Rule(Caution: Ask your DM for more skill pointsSuper Evil Action) Shapechange into a Greater Doppelganger1.
Ask your DM if increasing Intelligence will grant retroactive skill points (the way that Constitution grants retroactive hit points.) If he allows that, then that would give you a lot more skill points to put into Use Magic Device.
**[Shapechange][4] into a Greater Doppelganger1.**
Consume Identity (Su): A greater doppelganger who eats the brain of a Medium-size or smaller humanoid victim absorbs the mind, memories, and personality of that victim. After consuming a victim’s identity, the greater doppelganger can assume the victim’s form with 100% accuracy and possess the victim’s memories, abilities, and alignment. The only exceptions are cleric spells of 2nd level or greater, a paladin’s special abilities, and other powers that are granted by the deities.
But, you would still have the divine spell-casting ability, doesn't matter if it is only up to 2nd level; which would satisfy spell trigger components.
Find a victim of the spell you wish to cast. Eat his/her brain. Cast your spell. You could even cast True Resurrection afterward if you feel bad for your victim.
**Have a familiar that can cast for you.**
I am assuming any wizard can trust its familiar. Ravens, for example, being able to speak a language can activate the spell trigger on items. Put some of its cross class skills into Use Magic Device and start handing it scrolls. You can use items to pump your familiars skill check up significantly prior to making the rolls to help out with its lack of skill ranks.
1Greater Doppelgangers are found on page 35 of Monsters of Faerun.