@RobertWhite @JimWoodhead : I mean worst case scenario, you should be able to ask for the license key associated with their SQL install... they should have that (or should be under the customer's profile in the partner portal) since they're the keepers of the keys. Then download a standard or express version of whatever version of SQL they put on the sales order, use/update the license the key for the installation, and viola. Circumvent the inconsistency with how Sage is delivering the downloads.
@JimWoodhead - you actually need all three files. The "".7z.001"" and "".7z.002"" files are data cabinet files housed as .7z archives that contain data necessary to install (because Microsoft's own FAT32 file system doesn't like transferring files > 5GB). So download all three, then run the ""microsoftsqlserver2014oemforsage100.exe"" to extract/compile everything into a true installation directory so SQL Server 2014 can be installed. You'll have what you need to install the product from there.