Welcome to the club, Dual!
What is your project?
My Continental engine was overhauled at an engine shop: Brown Aviation in Tulsa, OK back in 2014. 918-835-6860
It still runs 400 hours later

Otherwise, I don't have anything...
Where are you located? Do you have a Cessna 152 you're working on? Why do you consider buying two engines?
Geoff