I'm not sure an annuity is a good move right now with interest rates being so low, but TIAA-CREF would be a good place to ask your question.
You could also change your AA inside your 403b. Most offer some sort of stable value fund or short term bond funds. tell us what funds you have access to in the 403b and we can suggest an AA.
OCCUPY ER, <=>
"The needs of the many outweigh the needs of the few, or the one." - Spock
Retired Mar 2014 at age 52
Target AA: 70% equity funds / 28% TIAA-Traditional/ 2% cash
Target WR: 0.0%,
Income from pension, rent, and eventually SS