I need a stock for an A3-03 ... original type or aftermarket doesn't matter.
Anyone know of a retailer that might have something?

Here's a few. I haven't been hearing very good things about Richards Micro-fit, the last one on the list here the past year. All these make stocks for the Springfield. The first one is a duplicating service, but if you read down in his literature you'll find that he keeps a few Springfield blanks on hand.

http://www.gunstockduplicating.com/duplication.html

http://www.hoosiergunworks.com/catalog/rifle_stocks.html

http://www.gunstocks.com/

http://www.northwoodgunstock.com/

http://rifle-stocks.com/

www.sportsmansguide.com

To that list,you can add Numrich Arms
www.gunpartscorp.com (http://www.gunpartscorp.com)
Frank

Sarco, Inc. at www.sarcoinc.com (http://www.sarcoinc.com) usually has military stocks. The folks at Boyds offer replacement stocks, but they tend to be much thicker and may have excess wood. Hope this helps...
Oberndorf