Possible to Repair Acrylic Window in Wallet?

[Hardrada]

Worst kind of accident: the one that happens when you're almost done.

Whilst marking the line for the stitches, the dividers jumped and landed on the acrylic window for this wallet:

 

 

Not just a scratch but an actual cut: it went through the plastic.

 

Is there a way to fix this that doesn't require remaking the entire panel?

Yea, I went and made worse by proceeding with stitching the edge band and locking the blunder in, but at the time I felt fixing the boo-boo would require remaking the whole thing and I thought it best to give a discount for the blem. Now, I'm not happy with delivering this as it is.

Any suggestions?

TIA for any helpful input.