Orbital Sciences Antares rocket uses previously mothballed Russian NK-33 engines. These were originally manufactured for the Russian version of the Apollo program but never flown. These are 70's vintage engines that get refurbished and launched. Also notable they are closed cycle engines, which was seen as somewhat impossible to achieve at the time. SpaceX newest engine uses the same concept, probably inspired by these engines.

Documentary about this on Netflix

https://www.netflix.com/title/80119093

I think the documentary makes some great points about how limitations drive creative solutions.