Hph 304s Jet Glider - No USA insurance, any advice?

I have been in the process of creating a glider club
with Hph 304s
'jet option' sailplanes. We have two already on order
with July 2008
delivery dates. I have been unable though to find insurance
for these
gliders. I have tried all the insurance companies found
in Soaring
magazine plus the EAA. Does any one have any ideas
or advice?

If I can not find a way to get these insured I will
be selling the
delivery positions. You can still get insurance for
the glider with
any other engine option or as a pure sailplane it appears.
They are
just worried about the jet because of how new it is.
Some insurance
companies said they may be interested in insuring the
jet option
glider once it had been around a little while. Please
send me an
email if you are interested in one of the delivery
positions.