If I am not mistaken the windows 10 tool your talking about only creates a recovery USB that takes up 250MB of the flash drive. It needs to work with an existing backup image you have created.
If you don't have that, there are a few options.
You could sometimes clone the recovery partition of a failing drive and run recovery with the new drive.
or
Microsoft has ISO's available for download if your company qualifies.
or
You could buy a recovery flash disk off eBay. I have seen some advertised that will allow you to install any version of Windows providing you have the OEM windows key the manufacturer included on the computer.
Sounds like you might have a Windows 10 DVD though.
If you own a copy of Windows 10, just install it...