I'm not aware of a source for SAA1027, but there are lots of other ICs that perform an equivalent task. They won't be pin compatible, but it should not be hard to find a functional equivalent.
For example the MC3479 is pretty much a drop in replacement from a glance at the datasheets. It's not pin compatible, but it has all of the same functionality. It's a bit pricey, but easily available from DigiKey.
I've seen some kits that read from IR and give you logic outputs. With a small amount of glue you should be able to use this to drive a more 'traditional' stepper driver (with onboard monostable) easily. No links offhand though.
For example the MC3479 is pretty much a drop in replacement from a glance at the datasheets. It's not pin compatible, but it has all of the same functionality. It's a bit pricey, but easily available from DigiKey.
I've seen some kits that read from IR and give you logic outputs. With a small amount of glue you should be able to use this to drive a more 'traditional' stepper driver (with onboard monostable) easily. No links offhand though.
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