You can order the kit from any of the online vendors, ie Summit or Jegs. I'm not sure which all vendors here on the board sells them, but I'm sure someone does. It's always nice to support the board sponsors, if you can.
They're all virtually the same kit, just re-boxed under different names.
Here's some info from Ramchargers. They're a great Buick vendor! http://www.ramchargers.com/cgi-bin/...rfnbr=25819&cgmenbr=541&cat1=25468&cat2=25818
You should be able to purchase a Melling hi-volume oil pump in your area. Anyplace that sells engine stuff. Worse comes to worse, go to NAPA. You should pay around $35. I've used them for years with NO problems.