how about the guy that told you about the midge? does he know what its tied with?
try
clear mono; olive underbody
olive mono; white underbody
clear micro tubing; olive underbody
olive micro tubing; white underbody
clear mono; olive flash underbody
clear micro tubing; olive flash underbody
clear stretch magic; olive underbody
etc etc etc
stretch magic can be found in your local big box craft store in the bead supply section or online
micro tubing can be found in your local fly shop or online
clear stretch magic over thread base