There is a reference under the 2MM "future releases" heading:
DS222A GCR/LNER/BR L1/3 2-6-4T
No price is quoted or any indication of timing I'm afraid.
Never thought about any discount! Just happy to assist fellow enthusiasts!
I might be tempted to try another Dean Sidings product myself if others report favourably. Years ago I "built" a Jaycraft J17, J19 and D16/3 which were similar to Dean Sidings products. I did an OK job on them but the chassis were the older crude Triang/Hornby products and the models just couldn't stand next to the newer finer RTR models.