There is no intake that I know of currently available that has LA bolt pattern and Magnum thermostat housing and bypass hose setup.
The genuine Edelbrock RPM air gap for Magnum is the only one currently available with the Magnum thermostat and bypass hose, but it is only available with Magnum intake bolt pattern.
All of the Chinese air gap copies I have seen with dual LA and Magnum intake bolt pattern have the LA thermostat and bypass hose setup.
If you really want an easy bolt on set up with LA intake pattern and Magnum thermostat and bypass hose setup you will have to find one of the old, out of production, Mopar M1 intake manifolds that were available years ago. These were offered in dual plane configuration (not an air gap design) and single plane version with or without fuel injection bosses. Many configurations available back then.