As it turns out, the only piece I had to substitute in the new rescue helicopter (60405) was the windscreen, and I'd really rather have the actual part, if anyone has the skills to make it since I don't...
Not a whole lot of links to give since it's a brand new part, but brickowl has it here:
https://www.brickowl.com/catalog/lego-wi...t-out-5274
As "Lego Windscreen 6 x 8 x 2 with cut-out 5274".
In the instruction book, the specific number for the windscreen piece in trans-light-blue is 6465637.
Not a whole lot of links to give since it's a brand new part, but brickowl has it here:
https://www.brickowl.com/catalog/lego-wi...t-out-5274
As "Lego Windscreen 6 x 8 x 2 with cut-out 5274".
In the instruction book, the specific number for the windscreen piece in trans-light-blue is 6465637.