We do not have another phase detector exactly like the AD8302 but with better bw, but we do have the IQ Demodulator ADL5380 that has 390 MHz of baseband bw. You would have to sample the I & Q outputs with a dual ADC, then take the arctan(Q/I) to get the phase of the two input signals (this would have to be done in some post processing). Would something like this work for your application?
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