Here's what I came up with. The nomenclature is not the same with each vendor and does not coincide with the Manufacturer's parts listing. Olblu49 has tricked it out for us with a very good description.

Here's the skinny from the 1929 - 1957 Master Parts & Accessories Catalog: (Thanks to Keith Hardy) Note - Italics and bold mine and are representative of description in the Master Parts Catalog.
Engine Mounting Parts

Complete Front Mounting Assembly Breakdown see Front Motor Mount Assembly photos here

3656502 Shield, Frt Mtg, (7 15/16 x 2 1/2 wide)
3657522 Plate, Frt Mtg, Top, (7 7/16 x 2 wide)
368449 Retainer, Frt Mtg, (7 7/16 x 1 5/8 wide)
3657520 Mounting, Engine Front

JC Carter -- ME533 Motor Mount Shield (3656502 Shield) They do not carry the plate or retainer

Obsolete Chevrolet -- ME533 Motor Mount Grease Shield 6 CYL FITS ABOVE ME216 this is actually the(3657522 Plate). There is some confusion in part numbers but it appears that Obsolete Chevy carries everything but the retainer. Call them to sort it out.

American Classic -- MM-12 Motor Mount Front Shield this is actually the (368449 Retainer). They do not carry the plate or shield. Their MM-12 is only about 8 bucks but they have a $20 minimum order which is the only vendor that has this restriction to my knowledge.

Why no vendor carries the complete assembly or doesn't use the proper nomenclature is beyond me. ohwell

Don

My 1941 in the Stovebolt Gallery
My Photo Album

But I tried, didn't I? ... At least I did that. RP McMurphy
The past belongs to the future...but only the present can preserve it.
Besides the noble art of getting things done, there is a nobler art of leaving things undone.