My wizard tried to copy a Bull Strength Scroll that my cleric created with scribe scroll. He could not. It never came up on his radial to try. He could copy Cat Grace from chest and Eagle Splendor from Temple. Can you only do it to existing scrolls not created ones?
claric and wizard spells are as different as divination and enchantment. a wiard can only copy wizard spells. created or found.
Best thing you can do is take the stat buffing spells at level up and buy scrolls for scribing from Burne. Especially if you plan to craft, nothing like a few Belts of giant strength and gloves of dexterity!