I was thinking ... if anyone (maybe the OP?) wanted the completeness of the Image Entertainment release but the better color of the Warner Bros. release, color correcting the IE might be the easiest way to go. So I tried it with the previously posted frames from The Mad Scientist episode.
color correct this to this
In a paint program, use the Histogram Adjustment to alter the individual Red-Green-Blue components of the IE snapshot, while comparing it to the WB snapshot. Use an eye-dropper tool (one built in or an external program) to balance the whites & blacks and the R-G-B's of main colors in between. This is what I came up with after some back-and-forth (it takes some experimenting & practice to see what the settings do to the picture; the eye-dropper helps by showing the R-G-B numbers and which direction they move):
HISTOGRAM
RED Gamma 0.7 Midtones +15 [compress]
GREEN Gamma 0.75 Midtones +10 [compress]
BLUE Gamma 0.7 Midtones +5 [compress]
This produced a good balance but the colors were weak. So I followed up with the Hue/Saturation/Lightness to increase the color strength:
H/S/L
SAT Saturation +55
The resulting color correction ..
.. is not perfect, but it's pretty close.
IE original IE color corrected WB original
The releases seem picture-stable enough that this single correction should work for the full episode and maybe the entire series.