Hi Tom,
You could check out the AD8510. It has a drift spec of 1uV/degC and a low offset at 400uV maximum. It can also output 70mA of current. For a higher bandwidth application, you could try the ADA4898-1. It has a maximum offset of 125uV and a drift spec of 0.9uV/degC. It can also output 40mA.
I hope this helps!
Kris