Board Thread:Off Topic/@comment-11276487-20130727193807/@comment-15959123-20140330054132

You can respawn him with console commands. Im not sure which code is the friendly version but there are 3: 04 023F7B,  04 031CA5,  04 039B6B.

Also Alduin is weak minded. You may use bend will on him. Again not sure which Alduin code.

Also if you dont like codes or something. Here is a mod: [http://www.nexusmods.com/skyrim/mods/37046/? Link! Not sure if works on serpentine dragons but worth a shot.]