sadly no possible with the Mindset, the bearing is built in, i already went to BSL cambridge and nothing will fit. ive since sorted it, 41mm bearing will fit once the internal cups are removed.If you still have the original (worn) bearings take them to a bearing seller on an industrial estate and they should have, or can get, them
Up here we have BSL (bearing services ltd) and Steel City Bearings. You should have similar equivalents