[Tails-dev] Verifying keys

Hi, I'm sorry for being off-topic but I have a request to make:

I have an old key that expired in Feb 2015 (0D24 B36A A9A2 A651 7878
7645 1202 821C BE2C D9C1) and I would like to use it to verify the new
ones. If anyone has kept it, could they please sign the new keys with it
and send me the signature or alternatively I could have a chain of
signatures and keys leading up to the new one if that's not possible.
Thanks

P.S Wouldn't it be a good idea to have such signatures of as many old
keys as possible on the website in case someone misses a switch-over?