You can buy those parts locally at most parts store.
Or you can browse PartsAmerica.com (
http://www.partsamerica.com) to check the parts, price them out, and so on.. and then buy them locally at your local Advance Auto Parts. I see there's an Advanced Auto Parts in Ogdensburg but thats pretty far from you.
I do see a few other local parts store near you. There's a "Gouverneur Auto Parts & Supply" on 18th Park Street, and "G & R Auto Parts" on 250 East Main Street.
I also see a Napa on 203 West Main Street. The good thing about Napa is that they are a chain of local stores with a centralized website. Here is Napa's section on suspension and steering:
http://www.napaonline.com/MasterPages/NOLMaster.aspx?PageId=400&CatId=7
You can replace just about everything in the front suspension yourself with a basic tool box. The only specialized tool you'll need is probably a ball joint press:
http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=38335. You will also need a few large sockets -- up to about 1" and then a really large one for the center nut on each wheel bearing assembly.
The upper ball joint is unfortunately a one piece design with the upper A-arm so that needs to be replaced as a whole. I see this item priced at around $90 at PartsAmerica:
http://www.partsamerica.com/ProductDetail.aspx?MfrCode=TRW&MfrPartNumber=10720&PartType=2070&PTSet=A
The lower ball joint is replaced with that ball joint press I linked to and PartsAmerica lists a lower ball joint for around $32:
http://www.partsamerica.com/ProductDetail.aspx?MfrCode=TRW&MfrPartNumber=104222&PartType=66&PTSet=A
The outer tie rods are typically around $30.
http://www.partsamerica.com/ProductDetail.aspx?MfrCode=TRW&MfrPartNumber=ES3302&PartType=80&PTSet=A
If you need to replace the inner tie rod, I would take in to a shop but if you want to do it yourself, search the forum. I've never done it myself so I can't say much about the process other than it looked difficult!
Of course whenever you change one of these suspension or steering parts, you'll need an alignment afterwards.