Hi,
You don’t say which screen is broken, the touchscreen (digitizer) or the display screen (LCD screen)
Here’s a link to a [https://www.actablet.com/digitizer-touch-screen-replacement-for-dragon-touch-m10x-10-inch-quad-core-101-tablet-pc_p15151.html|supplier] of the digitizer. It also has a video showing how to replace the digitizer.
It is shown just to give you an idea of the cost of the part and how to replace it.
There are other suppliers online that may suit you better. Just search for ''Dragon Touch M10x digitizer'' to get results.
Here’s a link to the ifixit [guide|62143] guide which may also be of some help in replacing either or both of the screens.
If the problem is with the LCD screen, unfortunately I haven’t been able to find suppliers of the part online. You may have better luck. Just search for ''Dragon Touch M10x lcd screen'' to hopefully get results for suppliers of the part.