Protectors for JP Gamecube?

[MoFo2]

I've been looking for protectors for Super Famicom and N64 and foundt it on Sentinal64 and videogameboxprotectors, eBay etc, but I can't seem to find any for Japanese Gamecube-games?

Those cardboard-boxes could really use some protection. I guess I could use some of the other protectors, but then it will not be a snug fit.

[kryss]

I store the cardboard sleeve separately.

[MoFo2]

Just loose in another box, or?

[kryss]

In a case designed for holding CDs.