I am making an electronic gadget that is powered by one of those small MN21/23A type 12v batteries. Battery approx size is 1 1/8" (28.5mm) x 2/5" (10.3mm) Can anyone tell me where I can get a small battery holder for this exact size of battery? I have looked at Farnell, Maplin and one or two others but can't seem to find anything specifically for this battery. If anyone knows of anywhere that sells them and has a part number I'd appreciate it. Thanks.