When Taito launched the Egret II Candy cabinet they gave it a modular control panel similar to the one Sega used on the Astro City. They continued this same panel design with the Egret 3 and Atomiswave SD cabinets. This panel design is larger than that of Sega’s but uses the same mounting pattern for the carriage bolts. This means that Egret II, Egret 3 can use any panels made for Sega’s spec, but not the other way around.
Here is a list of all of the officially released panels that I’ve been able to find in this style. If you know of others please send me a photo and I’ll add it to the list.
1Player Joystick Panels

(Bare Plate PN: E3016093B)

(Bare Plate PN: E3016093B)

Control Panel Assembly PN: M03153317A

Control Panel Assembly PN: M03153316A

Control Panel Assembly PN: M0315302A (Bare Plate: E3016926A, Overlay: G1502074B)
Factory Button colors for P1 ball-top and buttons = “Green”, start = “Orange”
2Player Joystick Panels

Control Panel Assembly PN: M03 15223A (Bare Plate: E30 13217A, Overlay: G15 01347B)
Factory Button colors for P1 ball-top, start, and buttons = “Violet”
Factory Button colors for P2 ball-top, start, and buttons = “Dark Blue”

Control Panel Assembly PN: U01 00259A (Bare Plate: E30 13223A, Overlay: G15 01348B)
Factory Button colors for P1 ball-top, start, and buttons = “Violet”
Factory Button colors for P2 ball-top, start, and buttons = “Dark Blue”

Control Panel Assembly PN: M0315293A (Bare Plate: E3013217A, Overlay: G1502044A)
Factory Button colors for P1 ball-top, start, and buttons = “Violet”
Factory Button colors for P2 ball-top, start, and buttons = “Dark Blue”

Control Panel Assembly PN: M03153318A
Buttons Only Panels

Control Panel Assembly PN: U93 00230A (Bare Plate: E30 13298A, Overlay: G10 01307A)

Taito Egret 3 Mahjong Panel
Control Panel Assembly PN: N9300230B (only offered as a fully assembled panel)
Known Missing Panels:
Taito Egret II Quiz Panel (Assembly: U93 00232A, Plate: E30 13375A, Overlay: G15 01391A)
Taito Egret II Hanafuda Panel (Plate: E30 13229A, Overlay: G10 01308A)
I found a lot of Images of 2Player Atomiswave Panels, but from all outward accounts these are custom and not official panels, There is no mention of these that I could find in the Atomiswave parts catalogs. Before you submit one of those to be added, some evidence (such as an official part number from Taito) will be needed.
Thank you to themisterfalcon for confirming the Taito Part number for the E2 1J6B panel (E3016093B) and providing excellent pictures of these panels.
Thank you to themisterfalcon for contributing an image and part number for the Egret 3 Mahjong Panel