Sadly the old Alex10 versions were linked to the current HA-Bridge of that time, so older versions would only work with old versions of it.
For that reason I took old versions off line.
I may have some of these builds on my development machine but that is currently on the blink (think the BIOs is dinner)the PiX10Hub is due for a Christmas release if not sooner.
If your interested in this solution I'd order a Pi Zero W, If nothing else it will give you a toy to play with over the holidays.
However I'm sure you will be impressed with its operation.
I can grant you access to the testing section if you PM me so your up on things when the PiX10Hub is released.