Have a look at the window cleaning warehouse
thats were i get my rubbers from. i buy ettore rubbers i find them the best other rubbers like UNGER ones i find you have to press abit harder when you shouldnt but it doesnt do a good job.
At the end of the day how i see it is.. its part of the most inportant part of cleaning the window dodgy rubbers will leave dodgy results so dont skimp on rubbers! get some good ones.
I dont dog ear my squeegee