dear friend, no problem , I can send to you missing parts (free cost for you ),except stamps for shipping in normal enveloppe (letter) :
..1 accessorie shoe + spring counter-plate + stop screw
but you must know this shoe is joint to the camera top with 3 rivets ...So I try to dismantle these rivets as clean as I will do, but without garanty of success (May be it will be hard to re-use them on your camera anyway you can stick the shoe and after put the rivets only for cosmetic . You must know it is easy to replace by nuts an screws because impossible to see them under the spring plate .
Thank you Alain! I really appreciate this!!! Please send me e-Mail on okynek@yahoo.com or let me know your e-Mail address I'll send to you shipping money and my address. Also in my Mir accessory shoe was attached by 4 screws(no rivets), probably another modification? Someone was trying to fix this camera, but apparently give up open it, but managed to lose the shoe part. Under top cover, camera has special plate with threads for the screws to hold the shoe. I do have this plate. After some twicling I managed to make camera work as a silk!!!, but shoe is still missing , hopefully not for long