Seeing the 10R has such a clear easy to read tacho, i wouldn't replace the whole thing.
But if u were the starlane set up
http://www.starlane.com/ on either of the first 2 models it easy enough to tape over the timer.
They can't stop u doing a TD if u have a after market tacho seeing all OEM's have a laptimer built in. Even if u rocked up to scrutineering with the timer function on with the OEM they won't know any different.
Built by craftsman, Designed by a genius, Ridden by a twat....