Holley six pack info needed.

Hello
Reworked my six pack carbs, now machined an other than that bone stock with all new Holley original parts. Now need your help where can i get a new metering block? yes i want the newer more ridgid design that they use nowdays. So for the facts:
Carb for 71RB 440 carbs #0-4670 metering stamped 6105....3 & this metering nr is the same on the carbs they sell nowdays.
Asking here as Holley supporter could not help me..only sell me another center...and i already have 2 sets tjohhhho
Thanks Michael

Is this for a restoration? If not why not put a billet metering block on it?

http://mopar-parts.tripod.com/ Phil Fish