I don't know of any newer shocks that don't require cutting the link, but cutting the link isn't difficult. The best option is probably the 2013 and older rc4, and I've had good luck with my vector hlr. Both require cutting the link.
The 2014 and up vivid won't fit without removing a lot of metal from the link. The vivid isn't a good match with the Sunday's leverage curve anyway, it's too linear.