I think you mean the expansion mesh: that was invented in the 60's and all the high frequency oscilloscope tubes had that since then, because it ease the need of the high voltage post acceleration voltage.
What you should consider is Tektronix's MCP (Micro Channel Plate) tubes, that can be found in the 2467 or the 7104. This was really state of the art construction with built in photo multiplier to the tube, although it would be sad to see destroying such a tube...