my complete 18Rgeu was about $500 so im not paying that again just for guides either, thats why i stuck with the groovy ones for now because they werent too bad, just the curved adjustable one had the worst grooves.
i couldnt find any guides anywhere for any cheaper that the abovementioned site, so if you do, could you please post up or PM me the details of where you sourced them from? il be interested in a set sometime soon..