I would check with Cameraqest,com and see if he cant you a replacement shoe. It is not a big deal to install and even the one you have can be crazy glued in place. I did fall on a Nikon SP with the 21 and the finder at one time. The foot came off - the finder survived (and so did the lens - though the vestigal lens hood looks a bit worse for wear). The camera just accumulated a couple of new nicks and dents among the existing ones.
I was going to Japan shortly after and asked for a spare foot when I got there. Got it and installed it - no problem.
The plastic, break-away foot, actually serves a purpose. IF you drop the camera, the stress is on the foot of the finder and if it snaps, it also dissipates the force of the impact, rather than distort the top plate or punch it down ward. This said, I too prefer metal finders ( i am just holding on to the camera with more authority!) as they are a bit more compact - and in the case of the Zeiss ones -spectacular to use!
This problem is not specific to CV finders, I have bent or crashed multiple Leica finders too. I did snap off the feet on a couple of Leica 21 finders (plastic ones) as well as crunching a 21 metal finder so hard that it bent the top-plate! Finders are prone to getting hit - and the plastic foot seems to be the weak spot.
Back in the days when I was using SLR's and flash - I used the Vivitar 283's and they had the same break away foot. Some aftermarket guy made a metal version, but after having bent multiple F2' tops with it, I found out that it was cheaper to have the foot snap than trying to fix Nikon SLR's top plates!!!!