Looking for N* parts

Hello, all: I'm working with Scott LaBombard to get my N* system (which is mostly made up of Vector parts) working. This has been an on-and-off project of mine for years, but I enlisted Scott's help since I can't seem to make it work. After slogging through all the parts, re-configuring everything, and doing some testing, we've found that I need either a N* single-density boot disk or an MDS-AD/AD2/AD3 double-density controller. It seems that when I got this machine a few years ago, the person must have had multiple N* systems and sent me only double-density disks (common) for a single-density (more rare) equipped system. Can someone help me out with this? Does anyone have a spare N* DD controller? Thanks in advance. We're pretty close on this one. Rich