You can't link to the DSE website directly. An M205 fuse is 20mm long x 5mm in diameter. Massive compared to what you are replacing. That said, if rated appropriately it would work but it would be a very very ugly fix. You should be able to get a closer replacement from Farnell or RS. It will cost more and possibly there's a minimum order but I would do that long before trying to kludge an M205 in there.