@thoft "I wasn’t able to free mine and gave up. They’re just in as flat"
Got it - I figured separating it would not be easy.
I am not certain about wave guided being available from Coherent Source. I had read somewhere that he sold complete driver assemblies for $250-$300 apiece and just assumed those included the waveguide.
Unless I hear from him soon I may just order those Madisound M13 replacements and perhaps at some point, have a wood-turning buddy try and lathe - carve some wave guides out of hardwood that matches the cabinets.