Tony, it sounds like his cylinder head outlet pipe physically broke apart where the thermostat top housing bolts to it. I've seen this before, especially when the bolt is seized to the outlet pipe. If you have a machine shop good with fabricating metal they may be able to salve the broken section. I've seen my guys at our local shop work wonders, especially with filling in gouged aluminum, but not sure about a section completely broken out. If no one here has one shoot me an email to email@example.com and will put you on the Wait List.
I have one. Shoot me an email to; firstname.lastname@example.org
I would have sold you one cheaper. Ask in here first, as ebay is not a reasonable source for new parts, It should be your last choice.
I agree with Russ that you should check here and see what we have, but disagree with the price and comment on eBay in general. To find a 50 year old unique engine part for less than one bill is not that bad. I just paid $900 for an ABS brake control Valve for my 2002 Escalade and it is only 14 years old. Direct from GM it was $1491.22, and that's a piece still around as NOS.
My policy has always been two fold. First I don't like to gouge people, but I am not going to give say a pristine front engine cover away. No I am not going to sell for $500, $750 or more (which you can get as they are crazy hard to find), but the days of selling them for $50 are long gone. So I adjust up to $125 to $175 in nice condition.
Second, I've been selling parts for 19 years and am in zero hurry to "get a sale" before someone else does. If I have something I often pop in and post that I have it, but often will let them ride to see if someone else has them. I also often share with those on my Wait List regarding others that might have an item, or point to an eBay listing.
Ebay is what it is. Some times great deals are to be had, some times not, sometimes the prices are absurd. For example, this past week I saw a NOS complete LH cornering light assembly go for $86! (CLICK HERE to see it) I paid more than that to have mine grill rechromed! I came close to biting on that one but let my prudence and pocket book reign that urge in.
So the point is to do your homework and know exactly what you need. To me $60 is a great price, assuming it is nice condition, regardless of the source. My going price is about $50 to $75 depending on condition, but as my Wait List backs up with customers looking for these, I will be inclined to ask a bit more.