ATM Looking for 8" f/4 mirror

["Joseph Colosi" <colosi@aosi.com>]

Hi,

This may be heresy, but does anyone know a commercial source for high
quality 8" f/4 primary mirrors?  I have made a couple of mirrors myself so I
am not shy about doing it myself, but I'm looking to put a scope together
quickly so I can try out the Canon 10D DSLR which will be arriving soon.

The only source I have been able to dig up is Parks Optical but they want
$390 for it.  Does that seem a little pricey?

Thanks,
Joe Colosi