Hello toro:
I have read several times your post, but I cannot understand which the problem is.
Have you tried the IAT rebuilding with ImportReconstructor?
What the results have been, if so?
If the address of the APi is a combination of seed1, seed2 and RVA of the call (is this right?), in any case you need the resultant address to be pointing to a valid imported function address. So, could you explain a little bit more what do you want to do?
Cheers
Nacho_dj