Roll your own
TyCa Industries 2x4 Target Stand Brackets AR500 Steel - 250lb Capacity - Powdercoated - Most Popular Stand On Amazon https://www.amazon.com/dp/B00VR6XL16/ref=cm_sw_r_cp_apa_yaF.Bb3VPWMVV
2 - 10 ft 3/4" EMT from Lowe's 1 - 2x4 1 or 2 (depends on 1 or 2 holes in steel) - 1/2" x 4" carriage bolt w/ 2 washers and nut for each bolt and a drill.
2 Lengths of chain w/ s hooks
Or in my case a compression spring
Mine had 1 hole and this is my plate rack