FITECH announces new intank fuel pump $349 for fuel injection

The fitech unit will be a good seller for sure. We should have them shortly. If its like the rest of their line, it should be pretty trouble free and a great priced and functioning item. But they sometimes push production delays...and if it launched like the TB units...we'll get a shipment, and then we will wait a long time on shipment number 2 to land...

Fitech FTH-50019 Hy-Fuel In-Tank Retrofit EFI pump kit

the aeromotives and holleys are currently available..

The aeromotive is a superior unit to the tanks in every way under the sun, and the holley in tank unit is also better than tanks.
I know tanks is popular due to cost, but modern ethanol blend fuel being used at 68psi through yellow zinc npt fittings? I couldn't consciously sell someone that unit, nor would it ever have a place on a vehicle I owned.

aeromotive complete A-Body tank
Super Stores - Mopar SB/BB Superstore

aeromotive drop in
Aeromotive - AEI - AEI18688 - Phantom Stealth Fuel System

holley options, both returnless and return
http://paceperformance.com/search.html#!sq=holley in tank||__ax=brand||brand=Holley Performance||sxq=12-13||sxq=module||sxq=in-tank

That should help your comparison and options.