Geeky GPS question (PCI card, possibly off-topic)

I have an old Airmap 5000. It stores the data on a PCI card that
slides into the unit.

My database is now 3 years old. Lowrance stopped providing data
about 4 years ago, and a year ago Jeppson dropped support.

A web search didn't reveal anybody else selling databases.

Now, that data is on the 'net. I'm a reasonably competant programmer,
and I could reverse-engineer the database format, and write code
that would put fresh data back into that format, thus updating my
database.

Here's the problem: I have no idea how to read/write to that
PCI card. Has anyone done this? Is there a driver somewhere, or
am I going to have to write that too? I'd assume there was some
sort of standard "data storage" PCI API, just like there is for
the data storage USB devices.

If I went to all this trouble, I'd be glad to update other people's
cards for shipping costs, since there isn't any other way to get
the data, and I'm guessing there are a reasonable number of these
out there.

Any help would be appreciated!

Tina Marie
--
http://www.tripacerdriver.com "...One of the main causes
of the fall of the Roman Empire was that, lacking zero, they had no way
to indicate successful termination of their C programs." (Robert Firth)