It’s only taken 50 years, but USA masters athletes are finally getting serious financial help from their governing body. As told in my deep-dive story for Times of San Diego, more than 300 eligible Americans as old as 103 can claim up to $1,000 for travel to Toruń worlds this March, and they can bring home up to an additional $1,000 for medals — $400 for gold, $200 for silver and $100 for bronze. Relay team members, too. The overall budget is $125,000, including $25,000 pledged by a mystery donor. I contacted masters national chair Rex Harvey and a dozen…