Look at the chips on the card, the main chip is a custom logic FPGA, if you do not have the info on what is going on in there you will have no hope in hell of writing new drivers, regardless of the size of the company. Steinberg staff hacked the Midex drivers in their own free time without having full documentation from the original vendor, doing the same for the 2000 would be quite literally a 1000 times more difficult.
Regardless of if you bought it as a Steinberg product, it has still been off the market for 8 years now … there are limits to what kind of service you can expect for a product that has not been generating any income for them for such a long time.
Would you feel right about asking for free upgrades and service on your model 2002 Ford in 2012 because the highway code has changed in the meantime ?