Weiand made the only "mass" produced MEL blower intakes, they pop up on E-bay from time to time, typically cost $1500 to $2500 depending on quality. The biggest problem with the Weiand is that they were essentially a race only manifold. There is no provision for water or a thermostat with the Weiand intake. Also, the distributor needs to be relocated as it interferes with the Weiand intake. I am working on making a street friendly MEL blower intake with water, thermostat provisions, and distributor clearance, but I switched jobs and moved across the country this summer and have not got my shop back up and running.
Here is a picture of the CAD model for the new intake I am working on getting produced. Hopefully I will have cast aluminum parts by the end of 2019. I also am willing to sell my Weiand once I get a functional prototype of new intake built.