DD,
March makes the only aftermarket set I could find, and they are $$$, If you are going side oiler ,I've been told by several experts to keep the 427 dampener with the pully cast on. that leaves the pump pully ......after paying 130$ for a march, I found that older painted and chrome ones are on e-bay regularly. I fyou get a one wire ford alternator it will come with a crome or billet pully,
I used an edelbrock pump ,seems to work great ,and I found them widely available, look around a little more ,I bet youll find one.
I put in a 160 and on cold days my engine wont warm obove 160 ,go figure
G,luck Karl