How do you replace the mid frame bezel (holds home and digitizer)?

The digitizer is usually stuck to the mid frame bezel like the home button. I found replacement digitizers for 4 dollars but now need to get a new bezel which doesn't include home button or buy another digitizer with the mid frame bezel for 8 dollars more.

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

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0

crwdns2942205:01crwdne2942205:0:

I heard that heating will cause the glue to give way but what about cracked screens.... Maybe a good question is where can I buy just the home button and mid frame bezel.

crwdns2934271:0crwdnd2934271:0crwdne2934271:0

crwdns2934285:0crwdne2934285:0