AN/ARM-186 (972Q4) Aviation Navigation Systems Tester Battery Pack

[Zorkomatic]

Hello, new member here, old f@rt Marine, 78-82, E-5, 2nd MAW, SOES and HMM-161. I recently bought a Rockwell Collins AN/ARM-186 tester for aircraft navigation systems (marker beacon, LOC/GS/ VOR), also known as the 972Q4. It appears in working condition based on the last tag someone put on it, but it has no battery pack, which is no surprise. It also did not come with the charger. 

 

Does anyone have an old battery back for this lying around, or maybe pictures of one? I am going to try to make a new battery pack using my 3D printer and ABS, with new cells wired in series for 9.6v. I could also use the charger, if you have one you don't mind selling or donating.