i should be able to get you a "demo" copy of the base code within a week or two (though it won't have all the functionality yet). I am based on 4.6.3 and have tested on 4.6 (i would guess that it would work on 4.5 since it is pretty self contained). It needs three packages from CVS HEAD aka 4.7 (postal-address,ref-itu,telecom-number), but at least the versions of those packages i downloaded a month or more ago work fine with 4.6.3 without problems.
