Does anyone know where I can get a replacement logic board for my hard drive?

I just learned one of those "Hard Lessons".

Lesson 1: Cheap power supplies SUCK.

My primary system was running just fine and then all of a sudden it powered
down. The system would not turn on. After unpluging the power connector
from the hard drive the system powered up but would not post. So I installed
a spare PS and my video display was filled with trash characters and would not
boot. After replacing the video card it finally completed post and attempted to
boot.

After testing the video card and hard drive in alt computers I verified that they
were in fact damaged. Other computers will not even turn on while a power
connector is plugged into the hard drive.

Lesson 2: You need to back up more than once every two years.

A lot of code can be written in two years. And a lot can be lost in two seconds.

Dammit, I know better than to not back up. At work I am always the a-hole
that yells at people for not backing up but I neglect that duty myself.

I lost an eighty gig Seagate drive and an ATI Radeon 9500 Pro. The new
good quality power supply I bought as a replacement was less than thirty bucks.
That is what I get for being cheap.

So, with that out of the way...

Does anyone know where I can get a new logic board for a Seagate ST380021A?

Firmware 3.51

Does Seagate sell parts to "end users"?

Thanks.