One day I will learn how to design PCBs, but until then I will find other things people have already shared on OSHPark that do more-or-less what I want and buy them! https://oshpark.com/shared_projects/OagLbtgI used to make http://www.gqrp.com/technical2.htm
@m0puh or buy the QRPLabs LPF's and BPF's. Very cheap, PCB & components.
@g0fcu Ahh yes, good point. I will definitely look at them as well.