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Digital circuit help


kosoniscs
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I've made a board which has four 7seg. displays multiplexed. They are connected at the same bus and a PIC controls the turn on and off time of each one of them. The problem is that, in Brazil, PIC is not so cheap and I would like to use a digital circuit to make it. The project is kind of a counter so that, it is not necessary to use a microcontroler. All I need to do is connect four different counters in the same bus. Can anybody help me with suggestions or circuits that could make it?
Another doubt that I have is about the noise caused by the mechanical contact of the buttom. Using a microcontroler I know how to 'don't see' the noise. How can I do this kind of thing using CMOS counter? Is there an ic that do this?
Thanks

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