That 1x key left (instead of right like pure) of the small 1.75x shift actually is possible, I just haven't made a plate for it yet. If I make all plate possibilities, including hybrid plates, that's just too many options. I can still add in a plate with what you requested, but not sure how many people are interested in it. The reason being for that layout is that majority of people will not have long enough R-pinky to stretch that far. You must have long pinkies haha.
I've already considered the solution you proposed, but making it long like that capslock will come at a compromise. All 4 switch holes in the PCB at that area have 90degree rotated switches there, so if there is a stretched hole on the plate, one of the plastic locking clips on each of the switch won't be able to clamp down the switch securely onto the plate. That's not a problem on the capslock because the capslock is not a rotated switch, so both top and bottom plastic clip can lock onto the plate. It's possible, but just won't be a fully supported switch by the plate. It won't be that big of deal if you use PCB-mounted switches, so I might add this back on there.
Hopefully that makes sense.