via xpander on muff's : "in my relentless effort to bring all of the Buchla style knobs back into existence, a group buy will finally be happening for Rogan "puck" style knobs thanks to the generous assistance of two fine wigglers. look for that to begin at the end of the week"
Can't wait for those and will definitely order some. Those where mostly used on the 259's in the Buchla 300 series, but some people prefer them to the skirted ones you normally see.
UPDATE: the group buy has begun over at muff's. Don't miss out!!!!!!