Hi Dani, it does seem strange that you have no filter fitted and as you say it really is essential, so I guess you have to fit one somewhere that's easy to change.
I can't see any reason why a filter upstream of the injection system could not be fitted.
This is similar to mine.
I'm sorry your car has been a bit unfinished, as you know it's a part of the Morgan experience but no fuel filter is a fairly serious miss, good luck with fitting one and enjoy your kilometres.