Is there are any way to get copper treasure on silver level, silver treasure on gold?

SanJin said:

Gold Treasure Item: Wishing Ring

Discard after equipping at the start of your turn to do one of the following:

1) Search through either the Silver or Copper deck and take any item of your choice

2) Receive 1000 coins

3) Receive 3 CT

As far as I know, its the only method.

Houserule ftw!

Heh, I wonder what gauntlets those heroes could want