Is there any way to get a bonus to Spellcraft

Crown of Dweomercraft, Epic: (ad hoc creation) +30 to spellcraft checks, 90,000gp
Diadem of Dweomercraft: (ad hoc creation) +10 to spellcraft checks, 10,000gp
Ring of Dweomercraft, Lesser: (ad hoc creation) +5 to spellcraft checks, 2,500gp
Gloves of Dweomercraft, Minor: (ad hoc creation) +2 to spellcraft checks, 400gp
Helmet of Dweomercraft, Trivial: (ad hoc creation) +1 to spellcraft checks, 100gp

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