YongGu Key for 20mm Padlock

I've had this padlock since I was in high school touring China in the early 90's. It was a tumultuous time right after Tiananmen '89 and the authorities made it mandatory to lock all travel bags before checking into the airport (it may still be the case, I dunno). So, I ended up buying a cute little lock in Shanghai that used a mini-key.

I've since lost the key and have been experimenting with printing a replacement based on other keys by the same manufacturer (Yong-Gu). Some day, I'll fin