how to get installESD.dmg

I have a late 2007 MacBook that I bought used. not knowing about apple computers I reset the laptop and then I couldn't install the Mac OS X lion 10.7 because when I put my log in it says the item is temporarily unavailable. I seen online I could download the software from online and put it on a usb and do it that way. I have a iMac running Sierra but the MacBook isn't running as it has no software so I can only get to disk utilities. I want to know if theres another way to get the installESD.dmg so I can put it on the usb since I can't extract the software due to not having a old Mac running an old software. is it possible for someone to email me the installESD.dmg is that even possible? I would really appreciate the help here I want to get this MacBook up and running. I can also be reached in my email. *****@ gmail.com Thanks in advance!

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