LOOKING FOR SPITFIRES

Hello to you all
Im looking for infos about 2 spitfires
the first one was flown by Frank Zavakos (No71 Eagle Squadron) when he was MIA in 1942. It had the serial BM249 but im looking for the side letter XR – ?. If anyone knows something or have a photo please share it.
The second spitfire was flown by Nicholas Sintetos (No121 Eagle Squadron) . I dont have anything, neither serial or side letters, but it was called “Ashtabula I” from his native city.

Thanks in advance
Dimitris Vassilopoulos