The new web site for veteran keyboard maker DSI over at dsi-keyboards.com sells a financial keyboard in Cherry Blue and ALPS versions. From the instructions on how to swap the keyboard with the keypad/touchpad sections it looks, to me, like you could just toss out the keypad/touchpad and fashion yourself a poor-man's tenkeyless mechanical.
What do you think? I suspect a circuit board or two might need to move and I'm not sure if both the Cherry and ALPS versions have the circuit board in the same places.