I opened a couple of threads at the Moddingway and the Evoweb forums asking for help. Let's hope for the best.
A possible suggestion would be to release the mod with provisional kits, more simple versions alike those of 1935-85. Then the real kits could be added in later updates: a bit like what is being done with the faces.
Because the problem is that all kitmakers are focusing in Fifa 15 and 16, or in PES, so I guess it will take quite some time to get all kits done.
As for me, I can only help with the DB, already sent info on the portuguese teams to Gigi. If you guys have problems with the Spanish ones let me know!