Where can I find 5.25 DS/DD disks?

Hello all, I have a couple of questions regarding 5.25 inch, DS/DD disks... First, where is the best place to buy some new ones? Second, does any manufacturer still produce this media, and what is the shelf life? Basically, what I'm asking here is, will our 5.25 drives become useless before too much longer? I remember a discussion on the group a while back regarding the use of HD media in DD drives. After reading about two thousand messages more complicated than quantum mechanics, I gave up trying to figure it out :-) So now I've resigned myself to seek the newest 5.25 DS/DD disks that I can find. Any help appreciated! Long live my Commodore 128! Thanks in advance, Earl Evans retro(a)retrobits.com Enjoy Retrocomputing! Join us at http://www.retrobits.com