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Attached are some PCB layouts (Kicad files and Gerbers.) Schematic PDFs are there, too. I've shared them all on OSH Park in case you just want to get the boards. (Links are in the attached file.) Because they're so small, they are very cheap on OSH Park. (The filters are $2.55 for three PCBs, delivered.) The filter modules use 0805 parts, but 0806 and 0603 parts can fit, too. You may notice a couple of the boards are laid out linearly. One is laid out with adjacent inductors orthogonal to minimize interaction.I typically purchase the capacitors and inductors from DigiKey. I use low cost 50V ceramic caps C0G/NP0 or X7R. For the HF and VHF stuff I do I haven't found any noticeable difference with the higher cost RF caps. For inductors I prefer wirewound, low series resistance. I also keep a couple of full sets of cheap capacitors from AliExpress to use in case I run out or need an uncommon value. I've had good experience with the ones from China, except that I sometimes find them mis-lableled. For example 15pF caps labeled as 13pF. I always measure the values before using them.