Mantic Effects CONCEPTUAL Flex Pro LFO Filter Pedal | eBay
FilterFX – 12dB/oct LP/BP/HP LFO filter with 8 waveshapes – Electric Druid
JMT Synth SVCF-1 Analog Bandpass Filter Pedal EFFECTS - NEW - PERFECT CIRCUIT | eBay
Dusk | Dr Scientist
FilterFX – 12dB/oct LP/BP/HP LFO filter with 8 waveshapes – Electric Druid
Guitar Pedal X - GPX Blog - Old Blood Noise Endeavors's ingenious Float Dual Moving Parallel Stereo Filter takes the Filter Pedal Format to new heights
Guitar Filter Pedals - Your Ultimate Guide from Andertons Music Co.