Looking for a 74LS "friendly" decimal counter or BCD to decimal decoder (similar to CD4017)
This is a request for a recommendation, which is generally off-topic here, but I'll try to provide a generic answer for replacing CD4xxx chips with LS or HC compatible ones.
Replace CD40xxx with 74HC40xxx. If you actually require LSTTL compatible input levels, then add a &quot;T&quot;. So we would get 74HCT4017.
Then we can look to see if such a chip exists, and voilà, yes it does.
If it didn't and a 74HC40xxx exists, you could consider adding pullups to the LSTTL outputs.