Phil,
I have fitted LN106 calipers to RT132 struts with Pug rotors, into my RA23 Celica. Google yourself to the DBA website and look at the Toyota info there. I understand that LN130 4Runner rotors are different (thickness & diameter) to LN106 rotors, so I would guess that the calipers are different also, but I could be wrong.
To my knowledge no one has used 4Runner calipers, finding the LN106 cheaper and a perfect fit.
Good luck with it.
Mitch.