Any idea where I can buy the endcaps for black V Channel?

I have looked everywhere for somewhere that will sell me just the endcaps for your typical v-channel. I need the endcaps with the holes for wire connections.

I plan to use pegs in a piece of adjustable shelving furniture that I will stick through the holes and mount the strips that way. This will allow me to easily light up drawers and shelves in my Ikea Pax wardrobe. But now I need the little endcaps and can't find them.

Any suggestions? I could 3D print custom endcaps, but that's a crazy rabbit hole to get started on. I was hoping to just purchase about 30 sets of endcaps with holes.

https://www.amazon.com/dp/B094XYNS78?niid=nl_cl_lst_a_0_1&nrid=WWGVR2TCTG675A2SQVHK