I am having a new granite counter top installed and the counter installer has said that I need to install new corbels on the knee-wall to support the weight of the granite counter top. The current and the new counter top extend about 12 inches beyond the knee-wall and the current brackets that are there right now (see picture below) will not hold the weight of the granite.
I agree with the installer that new brackets need to be installed but I am having difficulty finding corbels that would work. I have tried both Lowes and Home Depot and depending on who I talk to either they have no idea what a corbel is (I didn't either up until now) or they point me to decorative corbels which are not made to support weight, let alone the weight of a granite counter top.
Any ideas what type and where I could find corbels that would be strong enough to support a granite counter?