Don't have or needed the filter here but if it a 1 inch-12 threaded mounting hole you could check the Lenz CP-752-30 filter at Tractor Supply provide there enough clearance for it.
Found I can the 522805401 has been on back order for over a year now. Husqvarna in general is getting to where things are on back order a lot. Just got a seat after it was on order for nearly 3 months.