Is powerbox pro the only router with SFP capability, I am looking for a small size, so not RB2011 and an indoor version similar in size of the GSP260 running ROS. Perhaps I overlooked all models, thank you for the feedback!

Cheers

You have a couple of options;
hAP AC
Hex PoE
CRS106 (not a router but a switch)

Both are similar size with SFP.