Often, the first choice people look at when wanting to do so is to take a level of ArchMage from the DMG. But note the bolded part below ...
Bleh. That sucks. It basically means you can't efficiently convert Stoneskin into a (Sp). Which is what I would like to be able to do.SRD 3.5 wrote:Spell-Like Ability: An archmage who selects this type of high arcana can use one of her arcane spell slots (other than a slot expended to learn this or any other type of high arcana) to permanently prepare one of her arcane spells as a spell-like ability that can be used twice per day. The archmage does not use any components when casting the spell, although a spell that costs XP to cast still does so and a spell with a costly material component instead costs her 10 times that amount in XP. This ability costs one 5th-level spell slot. The spell-like ability normally uses a spell slot of the spell’s level, although the archmage can choose to make a spell modified by a metamagic feat into a spell-like ability at the appropriate spell level.
Any other suggestions on how to go about getting a spell with "costly material components" turned into a (Sp)?
Thanks!