LM7321: Robust IC output for current loop +/- 20mA

Hi,

I have to realize a robust output for current loop +/- 20mA.
My old circuit uses an L272D as output, but it has high offsets that make the circuit inaccurate.
Besides the L272D has been in production for years and I would like to avoid using a product that could go EOL.
I was looking at OPA551 and LM7321. Must work at unit gain
The output realized is of insulated type and could be subjected to transients, having a high length loop with high cable capacity.
Which of the two ICs is more suitable in your opinion? Do you recommend other Op-amp or Buffer?

thanks

Robert