FYI, a slightly off-track sidebar, to show some of the changes to Rics over the years and also some copies to indicate suitability for a project like this.
Here's my selection of Rics, spanning 5 decades; the blue '78 4001 3rd from the left is probably the nearest to his; you can see the horns are significantly wider.
Here also are 6 fakers (well, 7 if you include the Kay hiding behind the sofa).
The leftmost is a 70s Japanese CMI with thru-neck, the Richthofen is a Retrovibe with Seymour Duncan pickups fitted, the blue, cream, and burgundy ones are barebones Chinese projects in various states off progress, and finally there's the Rickenberger, which is just something I fancied doing.
Of those fakers, only the vintage CMI would be suitable for a Lemmy, as the others have the wrong bridge and/or wrong scale length and/or wrong treble pickup position (the vintage Hondo II models also have that).
Actually, if you place the CMI and the '78 Ric side-by-side, they are really quite similar.
(I may be converting the CMI to a single-pickup 4000...)