Hi, first at all I love Sweden and I miss that land very much. I´m being working there (In Stockholm) in the 2009 at Ascade, a Telco, now owned by an american co. Also there, they had for a long time a problem with a regex they need to use for some id of providers, and I solved that in just a couple of hours. I studied computer sciencies in University of Buenos Aires and there I got a strong background in regular expressions. So not only I´m feel able to solve your needs, but also to justify it formally. I don´t know exactly what the boundaries of the service you need provided is, but I´m sure we can go to a reasonable agreement.
Hälsningar från Buenos Aires, Luis Garcia.