Several available for Specialty Green (Asian PHOAT). Least expensive currently PepBoys OEM brand Concentrate. Available either from PepBoys at ebay $17.67 delivered. https://www.ebay.com/itm/OEM-Concentrate...=item25cef6f756
Or in PB store if they stock it locally, $14.90.
Also Pentosin/Pentofrost A2.
If doing a complete flush and don't mind changing the tint, Walmart Valvoline Asian Vehicle premix.
My first choice would be the PB OEM Concentrate, green tint.