Yes, I do, but what do you consider to be inexpensive? Unfortunately, the question should be how to test the quality of a PSU, which is where it gets to be more expensive. The majority of PSUs that are in use for AH are (I would bet) inferior from the start. Testing a PSU with the Christmas light tester will not tell you anything. A multimeter is better, but still is not telling you much. You can get a PicoScope USB Oscilloscope for less than $1,000, but then are you into computers for gaming or for electronics? Someone that does this (flies AH) for a hobby probably doesn't also play with electronics, except for a few HAM operators. Someone in the business of repairing electronics will have more invested in test equipment. A really good Teledyne unit goes for more than $20,000, but you don't need that for PSUs.
Rather than buy anything it would be cheaper to just replace the PSU.