Anyone looking for a gold-embossed leather Merkel case label, and doesn't mind paying, should toss the following search term into ebay:

GUN RIFLE DRILLING PRESENTATION CUSTOM DISPLAY CASE BOX TRADE LABEL for MERKEL

The seller is Luxury Weapons Cases, boasting over 800 sales for 100% feedback.

No personal experience with that seller, but their stuff looks good.
...although how the hell they can just send stuff out of Ukraine atm is beyond me.

They do have a Simson leather label in their lineup. Just as well: the Simson artwork I mentioned earlier is on one of my portable hard-drives, proving to be elusive.