long shot request for help

a couple weeks back i stumbled on a website. a guy makes custom and one-off audio pedals (some guitar, some for other purposes) and sells them. he had at least a couple dozen different devices for sale, maybe more. they all look home-made

i recall that only a handful of the devices were guitar pedals, but a search for those brough me to his page

one of his devices was a hand-held thing that picks up electrical and/or magnetic waves. the idea is to walk around city streets and pick all kinds of weird sounds from around you

i thought i bookmarked the site, but did not. can't find it in my history

maybe using the initials LS?

finally, of copurse,if you know of anyone else making and selling things like this i'd love to know about them