In order to achieve 64.5 mm in height, you can combine a KOH6 with a KOH2. Or twice the KOH4. Many other manufacturers also have nice cases, as our pcb's are 100 x 160 mm in size.

DEVICE	PARTNUMBER, MANUFACTURER
Rotary Encoder	Bourns, PEC11R-4215F-S0024 (Mouser)
Knob	Eagle Plastic Devices, 450-BA600 (Mouser)
PCB	Changpuak

DEVICE	PARTNUMBER, MANUFACTURER
OLED : SH1106	Monochrome 1.3'' 128x64 OLED graphic display
	from Ali or out of the Bay
PMMA window	sometimes this and sometimes that.

The Frontpanel was designed using Target3001 from IBF. There is a free version available, you are bound to have your pcb's or frontpanel's made from Beta Layout. As this is the only company printing on aluminium, that's not a problem. As a starter, you mayst want to check out - a completely random - file from me. And double check, that all elements to be printed are on the correct layer !!!

In case you want to build a complete Setup with four Mod's, those parts mayst come in handy :

DEVICE	PARTNUMBER, MANUFACTURER
Case	SG19 (#133063, Proma) from e.g. Reichelt
Gerber	Gerberfile Frontpanel
PCB	PCB Frontpanel
USB	Panel Mount USB Cable - B Female to Micro-B Male #937 from Adafruit
Power Entry	Farnell, 2950121, Schurter 6162.0058
Power Switch	RND 210-00711, Distrelec 301-87-242