Boost Brothers Garage offer a swap kit to install a Volkswagen 2.5 L 07K inline-five into a Porsche 944 or 968. The basic swap kit costs $1,399 and the complete kit costs $4,995. The complete kit includes everything needed such as mounts, billet valve cover, oil filter block, power steering pump mount and pulley, bellhousing, upper oil pan, SPEC clutch and flywheel, and more. The kit allows for the crossmember, power steering rack, and vacuum brake booster to remain in their factory location. It also allows the factory hood to clear the engine. The company also offers a bellhousing adapter for $770, SPEC clutch for $575, and SPEC flywheel for $400 that allows the inline-five to connect to the Porsche torque tube.
Update 2-18-2021: Updated prices and included complete kit
Source: nineXengineering and Boost Brothers Garage via Piotr