I2C : PCF8574 emulate with PIC 16F84

Does anyone "make" a PCF8574 with PIC 16F84 ?
This PIC is obsolete, but I'd like "convert" it in 8 I/O
over I2C protocol.
I looking for this source asm.
Thanks a lot.
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Arrow sells the original part for $1.79. According to Philips, they have them in stock. Sound a hell lot cheaper to me than writing an emulator on a chip that can hardly keep up with 400kHz I2C.
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Matthias Melcher

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