You can TRY this bit of slight of hand...
If you can browse to the point of d/l'ing a current patch and COPY the link. Paste it into your browser address line and see if you can modify the address to point to the correct ver and patch. You may have to mod dirs as well as the file name.
I had to use this to d/l the SI 7.5 SP 2 recently.
It depends up CD maintaining older files, maintaining them in place, and maintaining their standard naming convention. I got lucky.
HTH.