DIY exploratory sunroof surgery? Without hesitation I'd spend an afternoon at the Junkyard pullin parts possibly an entire sunroof intact. Not knowin alot about 124 sunroofs thats where I'd begin.

Always healthy learning experience pulling parts at the boneyard, helps you sharpen skills for install operation with no fear of makin mistakes like trashing the liner there. And bring yer own battery into the yard if you require electrics for the junkyard adventure.