I found something on amazon that looks like it will work. I'm going to try it this coming weekend, mainly to see if the bees get caught it in. I think it will work, thou I don't know how active SHB are now that it's cooling off. I ordered batting material, like they make padded blankets with. I bought one the size of a crib and it rolls out to about 5 feet. I've been using oil trays and they work, but they are expensive. I'm hoping to find something that works so I can move trays around. Right now I've got one under every hive, but they cost 30 bucks each. That adds a lot of cost to a hive. I'll respond back to this thread next week, but it's going to freeze her the next two nights which is pretty unusual for this time of year...