So are there any 'DiC-heads' that know if these recordings where Don Francks voiced Dr. Claw are available somewhere? I had no idea Frank Welker was the 2nd Dr. Claw but I'd like to hear the original episodes and parts with Francks for comparison.

This is the paragraph:
"Due to the recording of the series being moved to Toronto, Don Francks initially replaced Frank Welker as the voice of Dr. Claw. Francks had recorded around 25-35 episodes as Claw before Welker was called back. Welker redubbed Francks' lines for all but 4 of those episodes, with Francks' original dialogue being audible in episodes 8, 19, 20, 24 and 27."

source: https://dubbing.fandom.com/wiki/Inspector_Gadget

Here are the different voices of Dr. Claw with Don Francks coming in at 1:44 https://youtu.be/qFx3weVnPBI?t=104

Also, Don Francks was Cree Summer (Penny's) dad apparently. In some credits, she's listed as Cree Summer Francks