Lots of different opinions on these distributors. Points if you know how they work are usually great to 10.000 miles, people not familar with them are scared of them for some reason. Electronic ignitions are also great for a long time till some thing goes bad, usually caused by inferior new parts.
Yes a $50 distributor from the parts store can be a great one also, IF IT HAS A CLOSE RIGHT CURVE! Some run great others not so well, but it will run. They are made for say ten years to cover say of all of the 413, 426 and 440 applications.
Numbers are numbers some restorations demand them for the points cars which I personally cannot afford but are a great source of reference. Lke the one the OP is looking for I have five other people looking for that one also. Goes by first on the list. If I get the core for 100 or 500 it is passed on. Then throw in all nos parts, new bearings 100 at least, leads 125, vac advance 250, point set 75 all MOPAR nos prices. Then a proper "MADE IN USA" cap and rotor easily can get to 175 also. Gets up there fast. So a good used one for 600 is not so bad IF IT IS GOOD.
NOSTALGA COLLECTOR 426 Hemi/raised block Dual Point Distributor -... (craigslist.org)
And some single points are very hard to find. great example 2875209 68 440-4 MT 375 hp find one under 300 for a good core. Have six people looking for one and just sent one to Germany.
Then throw in crank triggers, MSD boxes etc. Mostly to gain a .01 in the 1/4. Really comes down to what are your goals and what can you afford. Many many ways of accomplishing a good running car. But always have some spare ignition parts with you. Justy my 2C.