Help sourcing Nord Lead 2x fuse and fuse holder

I recently acquired a Nord Lead 2x that I need to convert to US power. There’s a switch inside to do so, but I need to switch out the existing fuse to a 6x30mm | Slow Blow | 300mA (0.3a) as well as the fuse holder. Having a difficult time tracking one down in the U.S.

Also does it matter if they’re ceramic or glass? I’ve seen ceramic around but I’ve only used glass fuses previously and don’t know if the type matters so long as the specs are the same. Thanks in advance.