I bought my DROs from 88490755 on ebay. They are the more typical style. I looked at Touch DRO a lot, but with the pricing on the Chinese units it's tough to go that route. I figure the glass scales aren't likely to have issues, and they should be able to be modified to work with Touch DRO later if I have problems with the display units. One thing that led me this way was that longer igauging scales get less accurate over their length. The short ones are fine, but longer units have more error. Glass scales don't do that. For the price of a set of igauging scales on ebay, I could buy the full DRO kit, and there are a lot of reviews here saying they like the Chinese DROs. There are a lot of sellers offering them.
On the down side, the instructions are written in the finest Chinglish which makes them somewhat difficult to use. That said, it's better than my Chinese, so I guess they win there. They all seem to be made by the same couple places though, so I suspect I can get help with them from the forum here and via YouTube etc..
I should also mention that I haven't installed them yet. That's hopefully soon. Some quick testing shows them working well. I just need to finish up some existing projects before I can get them installed.