Your best bet is to order a complete top-end kit from North Tahoe Motorsports.
Their kits include a Woosner piston kit, all gaskets and a top-end bearing. Doesn't get any easier. Call them if their Ebay store doesn't list what you need. Dealt with these guys before and they are first-rate.
Here's an example of a listing:
http://www.ebay.ca/itm/TOP-END-GASKE...item1c388c5aa9