So if I used the Sabrent or similar product in theory if it worked I could just clone the drive to the new one using that and nothing else?
I see you are relatively new here, so you probably haven't had the time to do mush of the research on what other members have already documented. I'll briefly repeat some of it, but you do need to do some of your own research on these forums.
If your drive is totally dead, there is absolutely no way to ever recover anything from it. But often a drive will "fail" in a TiVo, but still seem to work when connected to a PC. If this is the case, you should try to use ddrescue to copy the readable portions of the drive to a new drive. This is basically the same as cloning the drive, but ddrescue is specifically designed to try to deal with bad sectors or other problems on the source drive. If ddrescue works, you can often then just put the new target drive in the same TiVo, and most or all of your old recordings and settings will still be there. If the data was too badly damaged or corrupted, it will not work, but you have not lost anything but some time to give it a try.
This is really your only chance to salvage anything from the old drive. And it does not work to move data to a different TiVo - the drive must go back into the SAME TiVo the source drive came out of. And as you have already been told, if it is a Bolt, that box must NOT have been booted even one time with any other drive since the source drive was removed.