Just bought an ASA5520, opened the box to upgrade the memory to 2 GB to support 8.3, and discovered that the unit only has 1 memory module connector. I thought all the ASA5520 units came with 4 slots? There are hole patterns for the other 3 slots, but nothing installed on the circuit board. As it is, the most I can load the unit with is 1 GB (ASA5520-MEM-1GB), but there are not any suggested 2 GB modules. If my console output didn't show ASA5520, I'd wonder if I didn't have a 5510 board installed in a 5520 chassis. Any one else seen anything like this? These are so hard to find right now, that I hate to have to return it to my reseller, as I don't think I can get a replacement for a couple of months. Any possible 3rd party memory fixes for this?