Amazon has one that can be 4 in 1 out or 4 out and 1 in and it has some large VU meters.

No prob. If you prefer making your own I respect that. It would probably look better and you could house it in wood.

https://www.amazon.com/Analog-Indicator-Audio-Splitter-Switcher/dp/B08N12PSC8/ref=sr_1_5?crid=GI0E1IM77QUY&keywords=douk%2Bvu%2Bmeter&qid=1684424669&sprefix=dou%2Bvu%2Bmeter%2Caps%2C133&sr=8-5&ufe=app_do%3Aamzn1.fos.18ed3cb5-28d5-4975-8bc7-93deae8f9840&th=1

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https://www.amazon.com/Douk-Audio-Analog-Meter-Display/dp/B0B79MF5VS/ref=sr_1_4?crid=GI0E1IM77QUY&keywords=douk%2Bvu%2Bmeter&qid=1684424669&sprefix=dou%2Bvu%2Bmeter%2Caps%2C133&sr=8-4&ufe=app_do%3Aamzn1.fos.18ed3cb5-28d5-4975-8bc7-93deae8f9840&th=1

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https://www.amazon.com/Douk-Audio-Analog-Meter-Display/dp/B0B79MF5VS/ref=sr_1_4?crid=GI0E1IM77QUY&keywords=douk%2Bvu%2Bmeter&qid=1684424669&sprefix=dou%2Bvu%2Bmeter%2Caps%2C133&sr=8-4&ufe=app_do%3Aamzn1.fos.18ed3cb5-28d5-4975-8bc7-93deae8f9840&th=1

https://www.amazon.com/Douk-Audio-Indicator-Amplifier-Preamplifier/dp/B082Y17WNG/ref=sr_1_6?crid=GI0E1IM77QUY&keywords=douk+vu+meter&qid=1684424669&sprefix=dou+vu+meter%2Caps%2C133&sr=8-6&ufe=app_do%3Aamzn1.fos.18ed3cb5-28d5-4975-8bc7-93deae8f9840

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I have the 3 which is also an Amp/speaker switcher if you need that functionality.

https://www.youtube.com/watch?v=tSK6Ohy5i6g&t=543s&ab_channel=cheapaudioman

review