Slee Off Road offers a heavy duty LCA. These are the LCAs that I am running on my FJ Cruiser and I have been very happy with them.
“These are direct replacement solid heavy duty rear control arms. These units are made from 27.4mm solid K1045 metal. They are treated with a Zinc Dichromate for corrosion resistance.
The arms are supplied as complete new units with polyester bushings. Includes bracket for emergency brake cable attachment.”