donating for the tomb?

sorry if this is a topic already dealt with somewhere in the messages. I've just seen the design for the tomb which I like very much, and read that the RIII Society is paying for it, that 65% of the funds have already been donated. I'd like to donate as well but don't see anywhere on the RIII Society site where to do that? can someone provide info or better yet, a link?

thanks!