Some references. Great article on Polar mounts and the KL6M feed.

The polar mount explained....

http://www.w2drz.ramcoinc.com/polar_mounts.htm

Cheap and easy 1296 feed...

http://kl6m.com/23cm/23CM-SEPTUM-FEED.pdf

Dish feed for 432 MHz...

http://www.ok1dfc.com/EME/technic/432feed/OK1DFC%20432%20MHz%20Loop%20feed.pdf