I can’t say that I’ve been looking, but I don’t remember seeing this before. The Czech Security Information Service report covering 2019 concluded that the engines in missiles used in the 2019 attack on KSA’s oil-related facilities were of Czech origin:
The attacks on Saudi civilian infrastructure in September 2019, including oil processing facilities in Abqaiq and Khurais, are a good example of the risks posed by re-exportation andKSA reverse engineering of controlled items. The analysis of missile debris led to the conclusion that the attackers used copies of Czech engines. These engines had been constructed using the method of reverse engineering with the use of some original parts. The investigation of the attack has not been concluded in 2019.