Ilex x altaclerensis "Yellow Center"

Ilex x altaclerensis "Yellow Center" is a hybrid between Ilex aquifolium and Ilex perado and has large, evergreen leaves with bright yellow center.  We collected this plant from an old nursery garden in Oregon and sadly it had no label.  We can only find one cutltivar listed that has this variegation - but its the wrong sex!  So now we have no idea what this is.  Hopefully someone in the holly society might know its name.  

• HARDINESS: zones 7-9
• EXPOSURE: part shade
• SIZE:  6-8'+
• SHIPPING SIZE: 1/2 gallon container.  15" plant.