does anyone know any big chain grocery stores that carry hazelnut liqueur?

Safeway

The best hazelnut cordial I know is Frangelico. Comes in a big bottle shaped like a nun.

Brown glass.

Yummy stuff, but expensive.

Don't know where you are, so can't tell you specific stores.

In the States, most stores that sell liquor would have it.

Most carry it. The commercial brand is Frangelico, but there are generics.

You ought to try a liquor store or a Costco that has a liquor store.