I don't know of any like the old Gordon's glass arrows, but sometimes there are some for sale here and there on auction sites or classifieds.
There's plenty of solid glass arrows for sale, used for bowfishing--but I don't think that's what you are looking for.
Chad
Those Gordon shafts are awesome! I just recently picked up 100+ shafts in differant spines fro $70. One of my favorite shafts and now I have a supply that'll last me years