Custom Offroad in Australia are doing stainless steel bash plates for the Grenadier. They no longer do Aluminium, instead 3mm or 4mm stainless and the weight is less than the Rival plates you guys have been mentioning. Great quality and great price AU$459 including freight to metro areas gets 4mm SS transmission and transfer case plates weighing only 21kg all up.
Mine just turned up today.
From their web site:
View attachment 7862088
Off to talk to them on Thursday about whether they can make a few more bits especially to protect trailing arm joints and the diffs