No, I don't think so.
I just did a quick search , and found it for $170
new from RPS Satellite.
Whether or not it is the best model for you, I cannot say, as I didn't get the deep into researching what those letters mean.
There is another model HARL to your ZARL, and I just didn't to the homework.
The more counts per inch the motor has, the finer you can position the dish.
Not a big deal for C-band, but for Ku, it's a lot more critical.
The ZARL is 32 counts per inch, which is well better than 24, and short of 48, so middle ground.
There are two kinds of jacks, the cheap with the acme nut (ajax?), and the expensive which are called recirculating ball.
Learn the difference, and decide if the fancy one is what you want or not.
I would look harder at getting the existing motor to work.
It's probably not spectacular in counts per inch.
Might be convertable from optical to magnetic...?
Can't offer you any advice, though.
Hopefully, one of the old timers here will know about it.
And lastly, I'd see what I could find for $80.
Maybe you just can't get anything decent for that price, but I'd darned sure find out!
I've seen 18" jacks for well under $50, but not on a regular basis (new).
edit: wow,
HARL 24" for $69 at Sadoun!
I see more shopping in your future!