The British Embassy has issued an unofficial translation of order 1490, dated 9th July 2012, with regards to the significant points which indicate that the central government now requires that employed and self-employed applicants provide supporting documentation to this effect, and that those without employment can either A) Provide proof of holding private health insurance or, B) In the case of Pensioners, provide proof that they are entitled to access to the Spanish state healthcare through arrangements made with the government of their home country.

Furthermore, applicants must also prove that they have sufficient resources (or income) not to become a burden on the state. 

In addition to the above, students must provide documentation supporting their course enrolment details.

http://www.tumbit.com/news/articles/5767-still-confusion-over-residency-changes-...

N.I.E numbers are for life. Very important here.
To be able to buy a house, get on the health system,
have a car etc. you need one.
Only empadraments, and Residencia change or renewed?
I am surprised that your husband does not have an N.I.E
number already, having lived  and driven in Tarragona area, before moving to L'Aldea.
The offices in Tortosa, down by the river, are easy to access, even if you are disabled, and maybe in a wheelchair.

Sorry don't know the phone number.
But, you can just turn up there, take a ticket and wait your turn.
Should be plenty of parking nearby for you.