Fred, if you talking about pump signs or decals I can't say that I have seen any, nor any large signage for that matter. It might be possible that a large retailer like UFA, United Farmers of Alberta, who had a lot of rural stations might have a dedicated pump for the purple died tax-exempt gas. However, it seems more likely that farmers would either purchase it by the barrel or have it delivered directly to the farm and have their large tank filled. Here in Alberta you needed a farm permit to buy purple plus your vehicles had to have farm plates.
