Seeking isolator/circulator for 123MHz

Hi all, for an experiment I want to do I'm trying to find coaxial isolators for operation at 123MHz. Bandwidth is narrow (<1MHz), peak forward power is up to 100W, average power is 10W. I don't need incredibly good performance, 0.5dB of insertion loss and 15dB isolation would be fine. Unfortunately the frequency is not negotiable. I'd probably be fine with a circulator with external termination as well.

So far the only thing I've found is some models from Raditek, but they haven't responded to my emails yet and I have no idea what their reputation is.

Any help would be appreciated.