Conversion from ThinOS Lite to ThinOS

Hello, I have acquired some wyse terminals (Wyse3020. These models only allow for citrix connections? (i assume via ThinOS lite), however our environment requires RDP connections which are not available on these devices. I have read of some models being able to convert to full ThinOS - is that process possible for this device and if so where can i purchase the conversion from? Many Thanks,