I haven't ordered them yet - they were the only caps I didn't have!
I'll probably get them from element 14, as they also have some other things I need. They're about $12 each.
I think I'll screenprint a front panel for the enclosure. I'm teaching a screenprinting class in march, so I could feasibly print it as the demo print and kill two birds with one stone. I'm also tempted to reverse screen my own faceplates for the 18W build at the same time...