these engines were kept in production in Poland
by PZL Rzeszów on licence.
They were installed in PZL Koliber 110,
a licence version of Socata Rallye.
PZL Rzeszów stopped the production some time ago,
all the rights for production and service were taken over
by a Polish company:
http://www.franklin-engines.com/
Try to contact them, maybe they will buy it from you.