My bleed valve in the engine bay has been broken (was like that when I bought the van) I assume for a while it did used to look like the picture below (which is a broken one but all the parts are there)

In my case the valve has snapped in half so I have the half that blanks off the upper hose with the two lower hoses connected together with a connection piece. Whilst the screw slot in the top piece is mangled so I can't even bleed that hose.
Is there a way I could recreate this bleeder valve? Or is it not worth the hassle?
I have attached a simple drawing of the setup