I have a very heavy duty trailer hitch.  It's in three parts.  One part goes into the receiver, another part adjusts up and down, and the third part is a bar that has three balls - 1 7/8, 2 inch and one that's larger than two inches.

It requires three locking pens and I ended up with two.  So, someone decided that the ball part was free for the taking, I guess, and I am now in need of that third part.

Any recommendations on where to buy that piece with the three balls that are permanently affixed like that.  I found it to be very convenient.  It's the heaviest duty, though I don't know for sure the weight rating without looking further. 

Thanks.

Perhaps this might be it?

http://www.valleyvet.com/ct_detail.html?pgguid=d6693687-1ec2-4249-9372-1b3329554e51&gas=trailer

That is the style.  I only need the part that has the balls, though.

Thanks.