Rene,
You could try posting to Yahoo Group "protel-users-resale". I wouldn't
hold your breathe though, I haven't heard of P99SE licenses for sale for
about 4 years now, they are a limited commodity.
You could also try joining and posting to the PEDA listerver as well,
at:
http://www.techservinc.com/protelusers/index.html
However, I have seen other recent enquiries on the PEDA list go
completely unanswered.