You should check out a few different threads. I have all of the blinds in my house now through SmartThings and each was less than $30. A lot of the projects require you to get something 3d printed so I figured I was out of luck. There are services out there to print for you but the shipping is so high it made it cost-prohibitive. I was able to find a site called 3D Hubs. They list people local to you who print for people and the site manages all the payments so you’re not writing a check or sending credit card info to a stranger. Then once they are printed, you arrange for local pickup. My local hub guy runs a CNC business out of his garage, so I just picked them up at his house. Got a TON of stuff printed with him super cheap.
And if you’re locking to modify either of those for vertical blinds, I did that too…this worked out so much better than I hoped. Hit perfectly on the first try.