Those shrouded pod air filters are actually robbed from circle track/dirt track auto engines. They use them as valve cover breathers. The shroud is to keep the filters from clogging with mud while on dirt tracks, so you may be able to buy them cheaper shopping in that direction: clamp-on dirt track valve cover breather. Gotta be sure to look at clamp-on style vs push-in style, though. The push-in ones are considerably cheaper, so don't let an inaccurate photo lead you astray while shopping. But tbh, $56 for four is not a bad price at all.
And yeah, I totally get the allure as well. :D
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