You should be able to find betadine most anywhere, my understading is it's commonly sold in tack shops and a pharmacy would carry it as well. If you cannot find it for some reason iodine could be used in a pinch.
I stop rolling mine on the 11th, both are rocking though one egg is significantly smaller and may require help. The bigger of the two is real fiesty though makes all kinds of a fuss when we roll them.
Good luck with your hatch hunter1hall.