Rallye dash mounted tach

I've seen only 1 retrofit in a rally dash and man what a hack job. That tach had its own housing, lens, and lamp, and 2 adjust stems sticking out the back of it. OEM inst' housing and bezel were butchered to ruins. To top it off, the tachs wiring had shorted to the column support so it was scrapped also. That was a very ancient retrofit of the totally wrong type of instrument. There may be other brands/types of aftermarket tach today that are better suited for this.
200 for a unit designed especially for this "limited" application ( bolts right in ) and it works with modern ignition systems too, versus buy 3 or 4 something differents to determine which is the better retrofit?
By the way... In correcting that rally dash for the new owner, I put a OEM performance indicator ( vacuum gauge ) in his center pod. If he has a tach today its mounted somewhere else.