Take a look here.
This is the link to all releases.
v3.0.1-40mm.zip is for the latest v3.0.1 however it is missing the imperial parts (only 4 parts different)
Download the v3.0-32mm.zip and there’s a folder called imperial listed in there with the 4 parts needed for the US.
On a side note, I’m also in the first stages of building a v3.0.1, see here. Feel free to jump in and post pictures / questions. I’m definitely going to be asking more in the near future.
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KA4JWB - Jason Bandy