Mirror diagonal for finder scope?

I just purchased a Hardin Optical DSH 8. It's a great telescope, but
my neck and eyes get very tired trying to go from the awkward position
of the finder scope to the much more comfortable position of the
eyepiece.

I was hoping there's an attachment out there that will convert the
finder scope's view from parallel to the telescope to perpendicular to
it (like the eyepiece). According to the "nice lady" at Hardin
Optical, there is no such device. Is this true?

If no such device exists, can finder scopes be purchased with with a
ninety degree sight (like a mirror diagonal for refractors)? I was
told by Hardin Optical that no such finder scope exists - at least
that will work with my DSH 8. Again, I'm having trouble believing
this.

Admittedly, I'm new to all of this, and was hoping for your help. Any
suppliers you know of (with web site adresses) would be much
appreciated.

Again, thank you for your help.

Mike