Almost all the DIN mounted stuff comes from Chalon Components. Their prices are about as good as I found anywhere. The enclosure is particularly nice. I think the only major item I didn't get from them was the main door locking switch.

Now that I realise Eddy meant the VFD I can see why he's mentioned it. There's not 70mm below but there's not much air restriction. There will be a hole above to let hot air out and it's at the top of the case specifically so it doesn't heat anything else.