I found some info on it and the site said they can make what you want.
Conductivity Alloys - Ampco 940 and Ampco MoldMATE™ 90
Ampco conductivity alloys are designed specifically to improve cooling efficiencies and reduce cycle times of plastic molding operations. The efficient heat removal of Ampco conductivity alloys also reduces post-mold warpage and shrinkage, and results in improved dimensional stability. Ampco conductivity alloys offer corrosion resistance comparable to stainless steel, and are beryllium-free.
Ampco 940 - A high performance, high thermal conductivity copper alloy for the injection and blow molding industries. Helps compensate for uneven wall thickness or part configuration. Offers better heat dissipation in areas of heavy wall sections or limited water channel access.
Ampco MoldMATE™ 90 - Ampco's newest alloy, Ampco MoldMATE™ 90, provides optimal thermal conductivity, tensile strength and hardness for plastic molds, tooling and processing applications.
Look for technical data and a listing of distributors for these problem-solving conductivity alloys on our News page:
www.ampcometal.com/news.html