FDSN StationXML-SEED Converter

Dear maintainers,
I am resuming the (closed) discussion about https://seiscode.iris.washington.edu/issues/705
We at RESIF would have to produce UTF-8 strings in station XML, for instance in
<Site>,<Agency>, aso, ... in order to be compliant with some normes in France.
Presently, we have decided to ASCII-ify those strings in order to be SEED compliant, but we would like to know
if the following proposition (in issue 705) is still under consideration:
"...
We will investigate how to map the UTF-8 strings to ASCII when creating dataless SEED, in order to try and avoid making invalid SEED and warn the user of any conversion.
..."

Thanks a lot for your responses
Best regards

Catherine Péquegnat