crwdns2933897:0crwdne2933897:0

Diopter adjustment knob is broken. View finder is now out of focus

Hi Good day. I just want to know how we can fix a broken diopter adjustment knob. Because of the old age of my camera, the adjustment knob got brittle and know my viewfinder is out of focus. Please help.

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2853045:0crwdne2853045:0 crwdns2853046:0crwdne2853046:0
crwdns2889612:0crwdne2889612:0 0
crwdns2934285:0crwdne2934285:0