I stupidly moved my Bag End cabinet before unplugging the banana inputs. I broke the two plastic cylinders that help support a banana jack. Generic pic... black and red cylinders are cracked and missing on my cab (one partial, one totally). These in the photo seem short... on my cab the plastic cylinders somewhat support the jacks. The possible good news is that the actual input (metal barrel) is a "C - mount" (screw-on fittings). I'm hoping that I can just replace the plastic cylinders and not have to replace the entire input panel (plus do the wiring). Anybody know if these banana input plastic bits are replaceable?