Need earlier update after re-installing 12.04

My PC crashed, as reported previously, and I had to do a fresh reinstallation of 12.04 LTS. I am still running the base kernel packages, 3.2.0-23 since the update somewhere after 3.2.0-45 was incompatible with my setup. My MSI 880GM-E43 uses onboard Realtek audio and ATI Radeon 4250 graphics to drive my HDMI port. I use 16GB of DDR3 SDRAM in 64 bit mode with the AMD Phenom II X4-840 CPU and run Ubuntu in 64 bit mode. When the HDMI sound disppeared along with the Catalyst driver, I was able to relog in Gnome to send the report, but gave up on replies and tried fixing things by upgrading, twice. 12.10 gave me no HDMI sound, and unusable GUI. I had a screen with impossibly small text, even on my 32" LCD HDTV, and 2 buttons. 1 took me to a similar screen with 4 choices that took me back to the 1st one. The other button gave me the terminal mode that has no exit to any GUI. There I tried apt-get a couple ways to fix things, no luck, and finally for the next upgrade, 13.10. This got me even less, just the tty terminal. I rebooted with the Ubuntu 12.04 CD, found the headphone jack working, tried a side-by-side install unsuccessfully, then bit the bullet and reformatted the whole partition and reinstalled.
I need the updates from early January, at least 2 before 3.2.0-50 just to be safe, and the last fglrx Catalyst package that still supports the 4250 GPU. I think the latest 'legacy' driver may be too recent, like for the 5xxx series rather than the 4xxx. Any help would be appreciated.
Also, will my system as described even support the upcoming 14.04 LTS?? It's only 2.5 years old!