Sorry, I haven't cooked lamb in years.
Maybe this message is for somebody else?
If you are referring to the flat basket I made for the 14.5, I didn't take pix when I did it.
All I can say is it started out as a frying basket for a deep fryer. I cut it down to 2" in height, modified the top to fit inside the basket.
I added shaft collars to accommodate a spit & four tabs with holes for height adjustment. I put two prongs on one side of the lid to fit the holes in two of the tabs.
I use two spring clips that fit the tabs on the other side of the basket to keep the top from falling out.