I've been researching this now for about a month. I did find that there is a company that makes a replacement housing for the Focus.
Dorman makes a thermostat/water outlet housing kit, the part is #902-201. The problem for now is EVERYBODY is out of stock of them. Dorman is telling their dealer that they should have them by April 1st or by April 15th at the latest. The housing looks to be plastic, but it listed as an "OE Solutions" item.
I've found some places that list having them in stock, but when I call they have been in FACT out of stock!
I'm planning on hitting the market again the first of April.
I was hoping to find somebody here that had bought a Dorman housing so they could let me know how it compares to the OEM crap housing, but so far NoBody??
Parts Nerd told me that they had sold 1,600 of them last year! I can't believe nobody on this forum has installed on eof them.