After thinking about the lack of options for the missing LED standoff I decided to take the opportunity to get familiar with OpenSCAD as I've been meaning to do that for a while. As a result there's now a .stl file available on the project page for this standoff. The design files are also on Github as usual. I've not tested this as I don't have access to a 3D printer currently but if I do get access to one I may give it a go.