crwdns2933897:0crwdne2933897:0

Dial Function Mode Plate Interface Button Cap

I discovered the Dial Function Mode Plate Interface Button Cap missing from my EOS 6D. Have no idea how that happened. What's a good source for parts (found some aftermarket parts on E-bay but don't know if they are good). Also, how does one install the lost part?

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

crwdns2934109:0crwdne2934109:0

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