Fluke Scopemeters are high-end scopes. Here's a selection of portable, analog, battery-operated scopes made by Tektronix that you should be able to get on the used (ebay) market:
211: single-trace, 500KHz BW
212: dual-trace, 500KHz BW
213: single-trace, 1MHz BW, high-end DMM using the CRT as a display
214: bistable-storage version of the 212
221: dual-trace, 5MHz BW
323: Sony/Tek, don't remember the bandwidth
314: Sony/Tek, dual-trace, bi-stable storage
335: Sony/Tek, dual-trace, delayed sweep, 35MHz (no internal battery but has external DC power input
In addition, the 464, 465, 465B, 466, 475 and 475A high-end portables (100MHz for the 46x, 200+ MHz for the 47x) with Option 7 will operate from 12v or 24v or the 1106 battery pack as well as the traditional mains operation.
Dean