hard plastic mini-lp covers

[Stonewall15]

I own several Japanese Denon re-issued Savoy mini-lps. They have a clear, hard plastic (or poly) open-ended cover that fits over the cardboard sleeve. These are not the common re-sealable plastic sleeves that most mini-lps come with. Sometimes called a "plastic slipcase". Does anyone know where I can purchase more of these hard plastic covers? 

 

Edited April 15, 2017 by Stonewall15
addl info

[Stonewall15]

Bump.

[Eric]

Yeah, this has been an "unmet want" of mine so long that I forgot about it.  Would love to hear of a source.

[Kevin Bresnahan]

I searched for these for years to no avail. I don't think the Japanese manufacturer is around any more.