256mm brakes

hi, i have a small problem guys…
i am running vauxhall calibra 16v front calipers the same as cavalier, astra etc..  i requre new piston seals and my local motor factors are telling me they are obsolete now and cant buy them, can anyone help me out n point me in the right derection please??
thanks   

have a look on the internet, or try a Vauxhall parts desk? Other than that your probably going to have to find a decent second hand caliper in a scrap yard.