The have some on Amazon, but not sure if they have all of them. You'd have to look up all the part numbers.
King Motor T2000 Front Lower Left Side A-Arm #501003 Fits King Motor T2000 https://www.amazon.com/dp/B00GTXUDGI/ref=cm_sw_r_cp_apan_i_KHRZG2X2V6WKB22MSACB
Not much into touring cars myself, but I do have a couple that have aluminum arms on them. But we just don't drive them that much because they are boring to drive in the small area we have here.
Experience 😉
Aluminum arms don't flex and absorb the stresses during an impact. Instead they transfer that energy to the hinge area, destroying hinge joints, bulkheads, etc. Either that or they bend.
That vehicle having a bigger body to protect the arms a bit helps. Does the body cover the...