Amazon.com: Adjustable Trailer Hitch, Fits 2.5 Inch Receiver, 10 Inch Drop Hitch, 18,500 LBS GTW, Aluminum Forged Shank, 2 Inch & 2-5/16 Inch Balls, Towing Hitch for Heavy Duty Truck with Double Lock Pins : Automotive
B&W Tow and Stow Ball Mount-Dual Ball (2" & 2 5/16") - Pine Hill
Amazon.com: B&W Trailer Hitches Tow & Stow Adjustable Trailer Hitch Ball Mount - Fits 2.5" Receiver, Tri-Ball (1-7/8" x 2" x 2-5/16"), 5" Drop, 14,500 GTW - TS20048B : Automotive
CURT 10,000 lbs. 5-3/4 in. Drop Adjustable Trailer Hitch Tri-Ball Mount with 1-7/8 in. 2 in. & 2-5/16 in. Balls (2 in. Shank) 45799 - The Home Depot
CURT Receiver-Mount Pintle Hook Ball Combination Hitch with 2-5/16 in. Ball, 2-1/2 in. Shank and 20,000 lbs. Capacity 48012 - The Home Depot
B&W Tow & Stow Receiver Hitch 2.5", Dual Ball (2" & 2-5/16") 7" Drop / 7.5" Rise (Universal)
Amazon.com: Traworvel Adjustable Trailer Hitch Aluminum 10 Inch Trailer Drop Hitch Ball Mount Fit 2 Inch Receiver 1-7/8" 2" and 2-5/16" Dual Tow Balls with Towing Hitch Pin Locks : Automotive