Inter-tech IPC 4420 Rails

I’m not sure where to put this. If is in the wrong place, mods please move it.
With that out of the way, I just took delivery of a Inter-Tech 20 bay IPC-4420. The catch
is when I ordered it, the Inter-Tech rails were out of stock, and still out of stock.
The StarUSA TC-RAIL-26 rails are in stock now. Does anyone know if these rails will fit this chassis?