Is it possible to get a Free Magic Shield?

I've been playing Zelda, and I've had my Magic Shield eaten by a Like-Like in Level 6, twice.

It's making me think, what if there is a way to get the Magic Shield without paying 90 or 160 rupees to some random caveman? Is it possible? Game Genie codes don't count; I'm doing Zelda Classic, not actual hardware or an emulator.

According to the Wiki:

The Magical Shield can be purchased from many of the shops found across Hyrule for varying amounts of Rupees; either 160, 130, or 90 Rupees depending on the shop.

It does not say that it is attainable for free anywhere, and I haven't found anything else saying you can.