Minkus Plate Block Supplements

I am not sure if this is the right area to post this, but I am trying to find Minkus Plate Block Supplement pages for 1984 through 1989 and 1991. I was given a fairly complete collection but with these years remaining and I would like to complete the collection if possible. I know they are out of print, but was wondering if anyone knew of where I could order or purchase these supplements.

Any help would be appreciated.

Thanks.

You could try www.brooklyngallery.com
They have TON's of older out-of-print supplements, Albums etc. They are a "real" store located in Brooklyn, NY. They also have a lot that is not listed on their site. If you don't see it, email them they just might have it.