He still makes them. Try to contact him through FB. He's a little slow to respond, but he usually does. Scott Scanoise (sp) is his name. He's on FB with his actual name too.
The '87 and '88 zilla should be clear in the non-blue parts the letters of the decal so you can see the swingarm through the decal. 89 and 90 it will be white in those areas.
No idea if this seller has correct dimensions. The zilla had much smaller decals than the LT250. Scott's are correct.