To my understanding, the property is no longer owned by Glenn, which is why they are building a series of stores and such in place of the land and buildings that used to be owned by him.
However, I imagine the sign will be thrown out; if not already. If you figure out the new owner of the property currently is, I'm sure they would be happy to give up the sign to whom ever is bold enough to ask for it.
It's such a bummer for me to drive by to visit my granddad, but there sure are a load of memories there that I will never forget. I wish my kids could have seen the place. For me, with the structure gone it sort of is further closure with my grandmother, Margaret - I had no idea that I would have felt that way.
Hope all is well for you Don! Please say "hello" to your wonderful wife of yours.