I hv a test equipment rack cabinet with a 7" high x 19" wide open space available. Would like to buy a rack mounted power supply to fit in that space. Want one with V & A meters, fixed at 13.8vdc or variable. Prefer a Astron model RM-35M or RM-50M in gud condx & reasonable priced but I will look at others. Can anyone out there help me? Tnx, 73 & Happy New Year, Bob, K6PF