Originative Mod L/M/S/SH are probably the closest thing you'll get to a Zealio V1 nowadays. You end up with a stock Gateron housing instead of the fancy Zealio housing, but I think the Mod stock springs are better. Also an MX Clear with the right spring can kinda sorta feel like a V1 Zealio. I should try some Mod-V1-V2 part swaps to see if there are any good frankenswitches to be made here. Or maybe swap in some opaque tops from silent Gaterons, or one of the milky tops...
But it would be really nice to see the V1 Zealio return with the improved stability and smoothness of the V2.