Using a lower voltage for a replacement fuse
The general rule is to always replace with the exact same type and rating. 

Multimeter fuses can be hard to find and expensive because of safety considerations, to meet the CAT II 600V and equivalent IEC requirements. 

If you replace it with a lower voltage rated fuse the multimeter will no longer meet the specifications, yet will be marked as meeting them, so it is a bit of a booby trap. 

Under no circumstances use a glass fuse, they lack sufficient interrupting capacity even at lower voltages. 



(I could speculate on the possibility that the fuses and meter could be marked in a misleading manner but it's better to be on the safe side). 

I suggest contacting your supplier. You're surely not the first one to blow a fuse.