I just recently bought an ALPS 1000 from ebay.
MD2010, 2300 and 4000 printers are first generation ALPS printers with lower resolution and a limited ability to print some of the later color inks. If water slide decals are your main goal then the 2nd generation printers will be what you want. The MD-1000, MD-1300 and MD-5000 are the only ones with the ability to print with the white inks. The 5000 is the only one that will print foil inks.
No, you cannot buy direct from them but here is the deal on exchanges. On the ALPS site:
MD-5000 & MD-1300 $350.00
All other MD Series printers $250.00
Now here is the real deal, via communication from ALPS. On the exchange program, they currently have the 4000 in inventory, so if you return that, you will most likely get that in return. If you exchange anything else (2010, 2300, 1000, 1300 or 5000) you will get a 5000 in return. Now it will not have the electronic key installed, but that can be had via the internet and/or ebay.
Since buying on ebay is hit or miss, I suggest buying a known broken one and doing the exchange. The 5000, which is what you will end up with, goes for upwards of $500 - $600. You can pick up a broken one for less than $40 and contact them about the exchange. Even for the price of $350 for the refurbished, you are still coming out on top by a couple of bucks.
This is the only printer available that can print waterproof, waterslide decals. They are no longer made basically since when they were, there was not enough demand and they were not making ANY money on them. Even after several iterations, it still was not profitable enough for them so they stopped making them altogether.
you can use injet printers, but the decals will not come out nearly as good and you cannot print metallics or white.
http://www.alpsusa.com/zcSite/alpsPublic/public/retailPrinters/index.html?retail_product_repair.html