@AmpBenzScientist I need the passband to be at 202 MHz, with a few MHz of bandwidth. I'm no expert on filter technology, but this frequency seems a bit high for quartz and their passbands apparently tend to be very narrow. It is unfortunate for me, because they'd be ideal otherwise.

I need to maintain the phase between two signals and to filter at least one of them. At the moment I've just made a simple LC ladder and put an identical filter on both signals, so that hopefully when they drift, they drift together. The temperature stability of this approach doesn't seem terrible actually.