Ways to Improve a SLA caster level?

[Dusk Eclipse]

Is there any way to improve a monster's effective CL for a spell-like ability?

[motoko's ghost]

the Primordial giant template from SoX gives +1 to the CL of all its SLAs, and its a +0 template

EDIT:
SoX stands for Secrets of Xen'drik

[roguemetal]

Most SLAs increase with HD. "If no caster level is given, its caster level is equal to its Hit Dice."

There's also Ability Focus which is a feat that specifically increases DC of one special attack (which usually includes SLAs) by 2.

[Dusk Eclipse]

The SLA in question is specified to have CL 1, and I need a CL increase not a save DC.

Primordial Giant doesn't work for what I need as it doesn't have the Giant type.

[motoko's ghost]

The SLA in question is specified to have CL 1, and I need a CL increase not a save DC.

Primordial Giant doesn't work for what I need as it doesn't have the Giant type.

Hmmm...That leaves quite a few less options, I'm not actually sure if there is a way, what exactly is this for?

[Dusk Eclipse]

Need to CL 5 to qualify for a feat and was trying to avoid using actual casting classes.

[TheGeckoKing]

Dungeon Mag. 116 (p44) has a feat called Practiced Magic, which is basically Practiced Spellcaster for SLAs. 4 Ranks in Spellcraft (and an SLA) for the prerequisities, and it should grant your SLA a CL of 5 by 5th level.

[Battleship789]

The SLA in question is specified to have CL 1, and I need a CL increase not a save DC.

Primordial Giant doesn't work for what I need as it doesn't have the Giant type.

The only RAW way I can think of off the top of my head is the Paragon template from the Epic Level Handbook, but that is probably a little much.

Edit: That Dungeon Mag feat is nice.

[Dusk Eclipse]

Hmm a shame it is from dragon (which is banned). Guess I'll have to use another way.