Business Notebooks

I need a Thunderbolt 3 dock for my new ZBook 17 work computer. My company supplied one for the office (P5Q61AA) but I work from home 1-2 days per week and frankly not having a dock at home is a PITA. I'm looking to buy one as cheaply as possible. Sources like Amazon are expensive, ranging from $250 to $300. eBay however seems to be selling a fair number and the prices range from $50 on up to the aforementioned $300. The problem is that it's a mixed bag of docks for 65W, 150W and 200W applications and some come with cables and power supplies and some do not. It occurred to me that since I do have a 2nd 200W power supply, I don't necessarily need to limit my self to the P5Q61AA. But HPs part numbers for the TB3 dock are a bit confusing so I spent some time doing a bit of online research. What I came up with was:

HP Sells 3 kinds of Thunderbolt 3 docks for different PCs

200W ZBook 17 Thunderbolt 3 docking station : HP product numbers P5Q61AA & P5Q61UT

150W ZBook 15 Thunderbolt 3 docking station : HP product numbers P5Q58AA & P5Q58UT

65W Elite Thunderbolt 3 docking station : HP product numbers P5Q54AA & P5Q54UT

The HP product numbers indicate a box of parts that includes the dock, the power brick, and the special dock connector cable. Per HP's partsurfer web portal, The actual dock (849784-001) is the same for all applications (65/150/200W). However, the dock-to-PC connector cable is different. Cables 843010-001 & 855116-001 have two connectors on each end. One for power and one for data. You won't find 843010-001 listed as a part on the HP website, but eBay has plenty of photos of that cable in plastic bags with HP's parts label on it that are in the original box for the TB3 dock. My assumption is that 843010-001 was the original part which been superseded by 855116-001. This cable is what's needed for the 17in ZBook. Cables 843011-001 & 855117-001 have two connectors on the dock end, and a single connector on the PC end. This connector is used for the Elite PC (65W PS), and *MAYBE* for the 15 in ZBook (150W PS). I say *maybe* because in looking at photos on eBay for many P5Q58AA & P5Q58AA listings, it appears that P5Q58AA comes with cable 843010-001 while P5Q58UT comes with cable 855117-001 as if HP engineers decided at some point that the separate power conductor was not really needed for the 150W option. I cannot discern any other AA vs. UT differences.

I thought I'd post the results here and run it by the experts. By buying just the dock (849784-001) and the cable, I can hopefully get a working setup for about $70 instead of $170 or $270.