Also, sorry for the self advertisement but maybe these would help?
www.hiveworkshop.com
Just in case you don't find a better version or don't want to use the original ones which sound a bit too old school.

Warcraft: Orcs & Humans reinstrumentation
Just my two cents of how it would sound a bit more realistic. Credits to Evilhog for the midi files and support! Original composed by Gregory Alper. Warcraft: Orcs & Humans by Blizzard Entertainment.

I might rewrite the story to fit current WC lore, but for testing purposes I think I will just copy Human mission 1 for now.