All the ones I found were white, so I ended up calling Heartland parts and ordering one.
they are ABS plastic and can be painted any color you wish with spray paint.... and if the part is wiped quickly with acetone before painting, it will remove any mold lubricant that may still be on the part, which will help the paint bond to it indefinitely.....
personally, for the sake of UV protection and preventing the yellowing of the white ABS products, I mask off and paint EVERY external plastic part on my trailers, and when something needs replaced, I dont care what color I buy because its getting painted before its installed....
the UV rays will turn the white ABS products yellow, and both the white and the black products get brittle in time when exposed all the time... painting blocks the UV from getting to the plastic, so it remains like new for years.....