One way to do it would be to generate a list of all possible combinations in Excel or similar, and add them to a VGPS, then filter them by archived status, country/region, etc. However bearing in mind that there are 99,999 combinations of digits, and near half a million combinations of letters (up to four characters after the GC, at present), and VGPD is limited to 10,000 at a time, this would be quite time consuming.