I have a stock of Master Quality Limestone, some Master Quality Granite, and can get MQ Basalt if you order in advance. I am looking to trade for some Master Quality Cloth Twine for tool crafting. PM me in game or here on the forums and we can hook up.
Realize that at 100 foraging you get about 7 MQ stone out of every 100 you gather, so orders in the 1000's are not realistic, but if you want 10 to 100, no problem. However, I don't deliver, so you will have to come pick them up.
My homestead, Dakota, is located in the NW corner of the map, zone 1061, Mount Rose area.