You can always investigate getting a one off decal here, http://www.nmma.org/certification/programs/trailers/
or use the picture for reproduction of a new one.
The (4) VIN/NIV stickers on the bottom of the decal are (4) seperate decals for placement on the trailer in hidden areas, like on the frame under the fenders, etc. rather than stamping numbers in the steel frame.
I just hope you can get all the data off your old decal or someone with a good decal can give you everything but the VIN.
Charter Member Number 1
At some point in time people need to wake up, remove their cranial intrusion into their own rectal areas, and take responsibility for their own actions.