I do have an upgrade option for your 6-1/16" long, 4" tall Equalizer # TREQ310 but since you don't want to lower the trailer at all it won't be with a Road Armor setup.
So instead I recommend the following:
MORryde Rubber Equalizers for Tandem Axle Trailers - 33" Wheelbase - 8K # MR87ZR
MORryde Suspension Upgrade Kit for Tandem Axle Trailers - 2-1/4" Long Shackle Straps # MR46ZR
The MORryde # MR87ZR measures 6-1/2" long and 3-1/8" tall, so it is the closest overall to your equalizer.... view full answer...