Hello;
I have assumed that you are interested in HTLS or High Temperature, Low Sag bare overhead power cable since since you are already a manufacturer of ACSR and AAC conductors. This is because HTS is also an acronym for High Temperature Superconducting cable.
If my assumption is correct, 3M is the major manufacturer of the type of products you are thinking of. Perhaps you should contact them. There is however much secrecy around the manufacture of the strength members (Strands and closing of same.). Http://solutions.3m.com/wps/portal/3M/en_US/EMD_ACCR/ACCR_Home/
If you visit WAI's Virtual Trade Show and select "aluminum alloy conductor"
www.wirenet.org/vts/vts_search.cfm you will find 19 manufacturers and some of these manufacture and sell aluminum-zirconium alloy rod for overhead electrical conductor redraw. Unfortunately I am bound by secrecy agreements and cannot discuss this matter further.
Regards
Peter J. Stewart-Hay
Principal
Stewart-Hay Associates
www.Stewart-Hay.com
519 641-3212