not quite. two choices.
if you split padmes two identities in TPM, make one mon mothma, and somehow add the mon mothma character into AOTC and ROTS as an operative character.
or
don't kill padme off, don't have anakin fearing her death etc. she just disappears at the end of ROTS. in ROTJ luke discovers leias identity, then enstead of mon mothma, a rebel general can introduces 'the former senator padme amidala', then an older padme is revealed. leia may be fully aware she is alive. perhaps luke could look at her and smile, and maybe grandma padme could look at him knowingly. she could give the address, and again, new actors brings lots of alternative exposition!
like all radical ideas, perhaps not straight forward, but surely would tie the sagas together a bit. (aside from jabba the seperatist...:P)