XPS 9370 Thunderbolt firmware gone missing

Even though I have previously updated my XPS 9370's firmware from 28.00 to 33.00, after https://github.com/dell/thunderbolt-nvm-linux/issues/10 got fixed, there's no longer any firmware available at https://fwupd.org/lvfs/device/4eeb9d07-a96c-56d6-92d3-4a23ee7a6e4a

Furthermore, there would be 40.00 available at https://www.dell.com/support/home/fi/fi/fibsdt1/drivers/driversdetails?driverid=2670n&oscode=wt64a&productcode=xps-13-9370-laptop which might be something that would have really helped me since I've a few problems with my Thunderbolt monitor with XPS 9370 only.

The contents of the .exe file do not seem straight-forward enough to mimick the example from https://github.com/fwupd/fwupd/tree/master/contrib/firmware_packager either so I've been unable to find a solution so far.