As far as finding a set... I'd watch, and get a good feel for what they go for... start checking places like the for sale/wanted sections on this site, Performance Years http://forums.performanceyears.com/6/ubb.x message boards and http://www.classicalpontiac.com/ (classifieds at the bottom of the page) as well as ebay to get a good feel before you buy anything.
(I'm sure this is what your doing.. but just in case)
Half of the year? More like 3/4's of the year! Lol... As a kid, Minn. was great... But I'd hate to have to work on my bird over the winter unless it was in my basement now as (a so called grown up!)
It will all come together soon enough... then you'll have to look for other things to work on with the car! Lol...