I use a mod'd steel clamshell cd "storage" case (removed CD sleeves)
I put them mics in the box, w/ cables coiled and foams on the capsules. The XLR ends go into a hand sewn neoprene sleeve to isolate them:
the neoprene is from some old fishing waders; their second life as audio gear.
I "flip" the neoprene sleeve into position, with the xlr's to the outside, parallel to the box sides, and the caps centered below them:
case closed:
This thing is really rugged. I could stand on it without damaging the box and its contents.
The fit is snug, without crushing, or damaging, to the foams, and the caps.