That switch looks just like one I bought for my doorbell. Parts-Express.com has many to choose from, and they're nowhere near that price! They have them with and without LED ring lighting. I can't imagine why you'd need the ring lighting on a guitar. It's nice for a doorbell though.
For an audio signal it may be more complicated than a single capacitor. If you're using the switch to ground the pickup signal, you may not have a problem. If you do, you can try using the switch like this:
When I was planning my Coffee build (one pickup), I was at one stage thinking of getting a 5-way super switch and have one position as a ”blower switch. Fortunately I didn’t get that switch, as already the 3-way super switch requires a maximum amount of space in the cavity. I would expect a proper switch made for a guitar (whatever you’d choose) be quiet and not pop.