I too have had a hard time finding ammo for my 1903. I have just purchased 3 boxes of 50 rounds on www.GunBrokers.com
. There are more on auction but are a bit pricey. I bought mine for $25 each. Others are going for $50 or $105 for two boxes. There are also several 1903 rifles at auction. I am going to a gunshow here in Jacksonville, FL this weekend. Wish me luck.
To everyone else, happy hunting.