Oil & Fuel Diesel leak from injector pump?

[Kenfyoozed]

I am still learning about my mf135 and all things related. She has had a fuel leaks for a while, but nothing major. So I decided i needed to start cleaning her up and repairing what I could. I found the leak to be a loose connection from the primary pump. But as fate would have it she sprang another leak. It seems be coming from the injector pump? That would be the piece of hardware on the left side with all the hard lines coming from it, correct? It has a small block off style plate that is secured with 2 small bolts. It seems to be coming from that block off plate. I assumne there is some type of gasket under the plate? And removing this plate allows air in and requires bleeding of the lines, correct?

So how far off base am I? Also where , online could I purchase fuel related parts? And how much is a new injector pump? Or do I even want to know?

Thanks
Neil