Amazon has six Bowden tube fixtures with a long piece of tube for $10, among many other choices. I may be having the same problem; I just bought 6 kilos of Tianse filament. What how good is their reputation? By the way, would improper storage of PLA would allow it to absorb enough moisture to gum up the printer? And can PLA be reconstituted just like silica gel, by putting in a warm oven?