Here is an example of Brigadier, with the public URL for your specific model.
mkdir MacBookPro14.3
./brigadier -h
Usage: brigadier [options]
Options:
-h, --help show this help message and exit
-m MODEL, --model=MODEL
System model identifier to use (otherwise this
machine's model is used). This can be specified
multiple times to download multiple models in a single
run.
-i, --install After the installer is downloaded, perform the install
automatically. Can be used on Windows only.
-o OUTPUT_DIR, --output-dir=OUTPUT_DIR
Base path where the installer files will be extracted
into a folder named after the product, ie.
'BootCamp-041-1234'. Uses the current directory if
this option is omitted.
-k, --keep-files Keep the files that were downloaded/extracted. Useful
only with the '--install' option on Windows.
-p PRODUCT_ID, --product-id=PRODUCT_ID
Specify an exact product ID to download (ie.
'031-0787'), currently useful only for cases where a
model has multiple BootCamp ESDs available and is not
downloading the desired version according to the post
date.
./brigadier -m MacBookPro14,3 -o MacBookPro14.3
Using Mac model: MacBookPro14,3.
Model supported in package distribution file at http://swcdn.apple.com/content/downloads/04/55/091-07710/tdkayeo2wv79g0zvv29tjpl ee05o4874g5/091-07710.English.dist.
Distribution 091-07710 supports the following models: MacBookPro14,3.
Making directory MacBookPro14.3/BootCamp-091-07710..
Fetching Boot Camp product at URL http://swcdn.apple.com/content/downloads/04/55/091-07710/tdkayeo2wv79g0zvv29tjpl ee05o4874g5/BootCampESD.pkg.
100.0% 809721856 / 809721217 bytes
Expanding flat package...
Extracting Payload...
Extracted to MacBookPro14.3/BootCamp-091-07710/WindowsSupport.dmg.
Done.