A step stool to remove things from lofts. Where can I get a good quality one?

You should not use a stool. A stool will not be stable enough to reach and maintain balance. IN addition to access the loft may require that you have to get in to the loft safely and back out again . Therefore a loft ladder of good quality "A" Framed step ladder is required - In addition this or any ladder should be secured to prevent moment when climbing it