There are archives containing the bitmaps of many of these fonts at various sizes and resolutions. The fonts must have been generated for the correct print engine: e.g. write-white or write-black. The archives generally hold only the sizes used by TeX. These are `magstep' sizes, and are not exact point sizes. It is probably better to generate them from the Metafont sources yourself if you can.
The best place to look for raster fonts was almost certainly: mims-iris.waterloo.edu
but it isn't any more, the fonts have all gone. Let me know if you find them elsewhere. Most people seem to have moved to using PostScript fonts or Bitstream ones instead now.
Some other sites are:
ctrsci.math.utah.edu (128.110.198.1) science.utah.edu (128.110.192.2) ymir.claremont.edu (134.173.4.23)
The occasional posting of ftp sites to comp.misc and comp.archives lists these and several other sites.