[tccrab]

Kinda looks to me that the '91 has been refinished at some time and the '92 is original.
The cam cover bolts in the '91 are much darker and don't show any rust
where as the '92's does.

As far as the sticker, a digital camer, photoshop and a lazer printer is your best bet.
You can probably buy matching size, color, coating, sticky backed labels from a local print shop.
Of course, the print shop could do the whole deal for you for probably only a small fee.

TomC