Guylines - Material and Sources

Hi
Been awhile since I need to get new guylines and I thought it would be simple matter of a quick search of eBay for a good Chinese supplier at minimal dollars. I was wrong
So any suggestions on good quality guyline material, best diameter etc and sources? I only need the rope itself.
Thanks in advance
Andrew
Been awhile since I need to get new guylines and I thought it would be simple matter of a quick search of eBay for a good Chinese supplier at minimal dollars. I was wrong

Thanks in advance
Andrew