I'd just call Justin at Lucky 8. I wasn't able to find the soft spring t/stat on their site, but he does have them in stock.

 

you should talk to them at BA simply because you are going to end up with multiple gaskets, you are going to end up something like 3 water pump and 2 timing chain gaskets buying kits. If they only sent you one of each the extra credit could pay for the shipping.