Where to buy banana pots

[bob]

I'm trying to repair me electrophoresis box.  My drawback is I can't
find the style of banana pots these things. Use.  I came close at an
electronics shop, short plug-in female socket, but they don't come
with the plastic screw on cover.  I've tried using heat shrink
insulation, but soldered connection end is not long enough to support
it.  The insulation just bends off.  Does anyone know where I can get
electrophoresis style banana pots?  Thank you.