Mamiya TLR 180mm lens aperture linkage broken

I got my 180mm Mamiya TLR lens out today, and while mounting it, the plastic piece that links the aperture ring to the actual aperture mechanism basically crumbled off. It looks exactly like this (not my photo):


Here's what it's supposed to look like:



Anyone have a lead on a replacement for that? If I can't find one, I'll try to either fashion one out of metal, or else model and 3D print a replacement, but I figured I'd ask here first.

I misunderstood — I thought you had just acquired this lens. Sorry.

I’ve had this lens for years, it’s not new to me. Can’t even honestly remember where I got it.

Try Bill Rogers: mamiyarepair.com

Thanks, I just sent him a message.