[SR-Users] Accessing received after lookup()

Hey All, I was wondering if anyone could point me to the right direction on the following issue: I use registrar with path to store contacts after main proxy. There I have properly stored received db field (original address of the NAT router). When I query the registrar, I get the user contact details (natted ones) in 302 redirect. However at this point I cannot access received avp (or I did not find a way yet, except calling reg_fetch_contacts which I would prefer not to since it doubles the work lookup does). Is there any catch which could save me in this scenario? After loopkup() is there any pseudovariable which I can inspect to find out user's contact data? Any other way to extract received contact data out of contact info? Thanks in advance for any kind of tip! DanB