Did a quick google search but not finding a threaded or slip flat strainers but have seen them in builds. Worst case could just have the bulkhead coming into the display and get a tub strainer and hold in place with a bead of silicone. If got creative could even mount a nylon nut in the bulkhead and fasten through to it. The one in the picture is about 4" in diameter.
Also here's my 2" CL intake in the overflow with room to spare.
