does anybody know that size oil feed and return line,  fittings I should have for a Hahn super 20g turbo and where I can get a feed/ return line kit for a good price??

Skr8 Goodz in tha hood
 
I am running -4 supply and-10 return.
Hahn uses-4 & -8 on his...  I built my own return.

 
 
thought so but wasn't sure 

Skr8 Goodz in tha hood
 
Try ATPturbo.com I did beaded 3ft and 2ft silicon