Mesa 7i73 output buffers

So I'm wiring the control panel/pendant on my Wotan HBM project. I'm using a 7i73 pendant control board in the remote operators panel. I've got all the inputs wired in, but I'm a little perplexed on the output side of things. The card only supports 3.3v at 4ma on the outputs.. The 3.3v part is sufficient to operate a SSR, but the 4ma drive current seems really low... Even a standard LED draws more power than that. Most of the opto-isolator boards I'm finding also draw more than that... My existing pushbuttons have 24v incandescent pilot lights in them that I'd like to use.

Anyone have some suggestions on buffer boards or relays that work with these cards?

-Matt Jorgensen.

For 24V pilot lights there are 2 high current outputs but if you need more, a ULN2003
or similar would do as a driver