Channel Balance

A quick learner from Milpitas says:
Hi, I'm looking for a replacement for the part (pictured). After browsing the website, comments seem to have narrowed down to option 2740 for below models:

https://www.swisco.com/28-inch/pd/Series-390-Channel-Balances/S390-28
https://www.swisco.com/28-inch/pd/Series-351-Channel-Balances/S351-28

1. Is 2740 the right one? Which of the two should I choose?

2. Currently both 2740 for both S390-28 and S351-28 are out of stock- how long would it take to restock?

Thank you
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Tom from SWISCO responded:

Your shoe appears to be 1" deep in your last photo, but that kind of thing is admittedly hard to tell. You never can tell when the tape measure is maybe a little skewed, and when you're dealing with a difference of 1/8" that can be a lot. You should triple check just to be sure. Assuming I'm right, you want the S351-28.

The 2740 stamp is correct, yes. We don't have an ETA on when these will be back in stock, though. Supply chains are backed up across the industry due to the public health crisis, and just recently the tropical storm  that hit us only made things worse. I can only promise you that we're trying to get these back on the shelf as soon as we possible can.

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