The trouble with two barrels

["Kevin" <grinding_gremlin@xxxx>]

I have a 258 six cyl motor in my 1977 Jeep Cherokee that I am 
going to stuff into my double mint Gremmie. One big problem,
The motor has a two barrel carb set up on it and the carb is shot.
The manifold on my on the motor I'm swapping has a one barrel 
manifold but it is cracked.(like me). So, I have been calling 
around to find a two barrel carb for this thing. Everyone I have 
called says, wow, you got a rare one there! So just how rare is 
this thing? I could still jimmy rig a single barrel manifold on it, but 
almost want to use the two barrel set up for two main reasons, 
#1. Speed #2. uniqueness. So does anybody here know where I 
can find the ultra rare highly sought after two barrel carberator for 
a 1977 258 cid motor? 
Any help anyone can provide would be greatly appreciated.
Thanky :)
Kevin