Bike products and related tools can all be found at bike shops e.g. Tarty Bikes. If you have questions pertaining to Magura parts why not look on the Magura website - this can be found by searching on google for Magura. If your maguras arent leaking but feel like crap you will need to re-bleed them. Refering to the 'clinging' noise I dont know what it is, but there is no coil in the hose. Investigate and try and establish what is wrong with it, then maybe email Magura. The oil in the brake is there for a reason, having said that if you need to bleed it quicksnap water & af wont do any short term damage, mine has been fine for 18 months. If your pistons arent moving the same distance lube up the sticky one.