Hopefully you will find someone wanting to sell a used set.
You could also make your own tool kit which would probably have better quality parts than the stock tool kit. That is what I would do.
As a last resort, if you really wanted a stock tool kit, and could not find a used one, you can still buy them brand new.
The tool kit part number for bikes between '87 and 2001 is 2JX-28100-00-00 ($50 - $70 depending on where you order it)
The tool kit part number for bikes after 2001 is 5VC-28100-00-00 (about $35)
I think the rubber band holder (for all years) is part number 3TJ-82131-00-00.
Here is a photo of what came in my factory tool kit (picture credit to Wheelie Nelson - I think)
toolkit - posted by Wheelie Nelson.jpg