I think if you have more experience with PIVX blockchain, this is a good option. What is thinking about this Mathias, do you have a connection with him in Telegram or X (exTwitter)?

I believe it should be perfectly possible to run an older blockexplorer version. After all, though EuropeCoin libraries are really old, there were perfectly working block explorers at the time when ERC was developed, and they will still run now, though may require older Linux distribution (e.g. Ubuntu 14 or 16.4 or similar) to run. It could be even possible to encapsulate them in Docker container, so they could run on newer machine, though this part I have never done and am not sure. I might look into this if Matthias and community think it makes sense to run an old block explorer (e.g. Iquidus).

From the other hand though... Is it worth the effort to have old stuff bundled with other old stuff just to make some temporary solution..? "That is the question", as one Danish prince used to say back then...
Porting ERC to a newer codebase will probably needed at some point anyway...