These E-locker faceplates are engineerd by us and will save you alot of money,  they are made of 1/4" steel, we have reverse engineerd the oem plate and solved this common problem most people are having.
they replace the factory Aluminum plate that ends up cracking over time from galvanic corrosion eating away from the Aluminum or just from the stress immediately directed from actuator motor torque. 
They are a direct bolt on plate, we do recommend you apply copper anti-seize between the actuator and this plate and the diff.
If you have any questions,  feel free to reach out to us for more information.