Here's the link to the official Matrix downloads. If this isn't what you are looking for maybe if you could be a little more specific maybe somebody else could help.
Try here for SPWAW downloads and utilities: The Armor Site
I went to the url you posted and here is what it said:
SpObedit no longer available Due to the number of changes that keep evolving into Steel Panthers, I can no longer continue to accomodate them in SpObedit. I have decided to stop offering SpObedit because of this. I do not intend to place it in the public domain as I do not feel it is fair to the registered users to do so. I thank the people who registered with me and want to remind everyone that it is copyrighted and to please not upload it for general distribution
"A government big enough to give you everything you want is a government big enough to take from you everything you have."<br />- Gerald Ford