First you must observe the fuse and determine two things - the size of the fuse and its current rating (Amps).
Fuses in UK wall plugs are 20mm long and range from 1A to13A but the fuses in your equipment are unlikely to be the same style as plug fuses.
Hobby electronic stores like Maplin or online suppliers like Amazon sell fuses.
The fuse will have blown because of a fault - just replacing the fuse will not fix the fault - a new fuse is very likely to blow immediately leaving you no further forward.
Good Luck..., March 2017