Did it have a Carter on it when you bought it? If so, you could remove the fuel fitting off the Carter and install it on the Edelbrock. That’s what I did for the years I ran an Edelbrock on my GTX.
edit: I think I misread your post. Appears it came with an Edelbrock with a barb fitting. I think any AFB or AVS fuel inlet fitting will screw in place of the barb fitting.
Are you looking for something like this?
Carter AFB AVS TQ 5/8-20 Brass Fuel Inlet Fitting 5/16" Inverted Flare | eBay