Somehow, someday, you'll mixed up your designed circuit with both CMOS and TTL, once this point reached, you wondered; "seriously, who says you could get enough PSU to play with?". :)
Anyway, here's my version of solving my problem quick.
Nothing special really, it's just a family of 78XX-series linear regulator, with 12V, 9V, and 5V output, starting from yellow to black (ground) respectively. Heatsink was from old ATX PSU.
Input coming from 16V power-adapter, via barrel-jack, filtered by 6800uF cap.
In my academic years, most of the colleges used to discard stripboards, so I take it.
Using it as the main base; not pretty I know, but hey, when you're cheap and desperate enough, anything could work. :)