Talisman creation?

[drewkitty ~..~]

It is the Spell or OCC power that are the only way to make Talisman. With each way being limited to what the text say they can make.

MUX?

There are not other way to make Talisman.

This is how I read what the text of the Talisman spell says.
Cast spell @ 500 PPE to make a Non-Specialized Talisman. (The Talisman is blank and can accept any spell, or be made into a PPE battery.)
Cast Spell @ 50 PPE to charge the blank Talisman with spells and spells' required PPE or to fill it as a battery.
Cast Spell @ 50 PPE to recharge the Talisman with the set spell and spell's required PPE or to refill it as a battery.

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The max PPE that a mage can have at one time is Base times four.
This breaks down to "the mage's base" + "base x3 of gathered PPE".

There is a caveat, some GMs do not let a Mage refill their Base PPE from LL or LLN. So with these GMs it is "whatever base PPE the mage has not used"+"base x3 of gathered PPE".