Well, you know, while the internet is a great shopping resource, some things are just more easily procured locally. I would try the lens cleaning cloth I mentioned earlier from a local Wal Mart in the optical department, or probably any place where they sell prescription glasses, or the micro fiber cloth from a car parts store, like olyteddy suggested.
As to spray bottles, I actually got mine in a CD cleaning kit I purchased from a CD store, years ago. and I just refilled it when it was empty. The kit came with a bunch of tissue like paper, and this bottle. Either I never looked before, or I had forgotten, but the back label on this bottle confirms it was filled with isopropyl alcohol, although it does not mention the percentage of concentration.
If you don’t want to purchase a CD cleaning kit to get a little bottle, and they really over priced for what you get, I have seen fairly small spray bottles in beauty supply stores like Sally Beauty Supply, and I wouldn’t be surprised if places carry like Wal Mart carry them also.
If, for some reason you simply must purchase these things via the internet, by putting lens cleaning cloth in Google I found quite a few listings selling mostly micro fiber cloths, and small spray bottle yielded a couple of placed to buy one of these. Remember, shipping is likely to eat you alive on these small items though.
I use the 70% rubbing alcohol just as it comes out of the bottle. I don’t dilute it any further, and it seems to work just fine.
As far as dust, rubbing alcohol works just fine, as would, I suspect, distilled water. For dust, itâ€™s just a matter of getting the cloth damp so the dust will stick to it instead of tending to just be pushed around on the disk.