I'm sorry you didn't find the plaque,
Bill
"The plaque is set into the sidewalk at the north side of Commercial adjacent to U.S. 101 and just east of the on-ramp to that freeway." ...from HERE
Soooo....across from..
GSV
......................................................................................................................Indoor Parking!
The strip club can be seen in the upper right corner of this Dedication Ceremony photograph. This helps to judge the distance.
fullertonobserver
The two lovely ladies flanking the Kizh chief are
El [on the left] and
Aliso [on the right].
So..I'd say the El Aliso plaque is somewhere within my red rectangle.
I hope this helps.