I need to know original sizes for all rubber seals / o-rings for Promax Decipher hydraulic disc brakes as I can't find any info or where to buy originals on net but have found a company that makes dot 4 compatible seals. (polymax.co.uk). (seals swollen and corroded so can't measure them) Am a newbie to forums and don't know if I'm posting this in right place. Can anyone please help?