I've just purchased 3 anti dust covers for my computers and I must say that I'm happy from them. Well packaged, the quality of the material used for productions is very nice in touch and most important thing to me, that the covers are really cleanly transparentable. I used till this time different cover from other company which got wasted after some time (it's broken, even small parts of plastic are gone now). These ones from Retronics looks solid.
I've prepared small article about these covers to support this company. Sorry, it's in Polish language, but you can translate it or just look at the pictures. There are also pictures of Atari 800 XE covered by one of dust covers. So, enjoy and thanx to Duddie for good stuff!
http://www.riversedge.pl/strefa-8-bit-i-scena-c64/ciekawostki/715-poznaj-nowe-pokrywy-do-komputerow-commodore-64-amiga-1200-i-atari