I am pleased to confirm that the Givi BF14 fitting kit (intended for the Ninja 300) does fit a 2011 Ninja 250R.
This is the TPH02 fitted - I think it might intrude slightly for very low tuck, but I think it will be OK for me. I do think that any other size tanklock bags would have to be carefully tested for fit as the tank doesn't seem to be huge on these bikes.
HTH, Pete