Re: Analog chorus for Andy Summers tone
I can 100% promise you that his 'classic' tone was a Flanger, not a Chorus (well, I guess both are sort of hte same idea, both have doubled or chorused guitar signals). If you look for a used one I can't imagine them costing much over 60. Specifically, the Flanger he used was the EHX Deluxe Electric Mistress. Later on he moved to chorus because, as I mentioned, they are very similar effects.
Heres an example, with a much more expensive pedal board, using a boutique clone of the Electric Mistress (far out of either of our price ranges), but again, this is 100% Andy Summers Tone:
When Andy did move to Chorus pedals, he used the classic Boss CE-1, and later the (now extremely famous) CE-2, a pedal which is often seen as the grandaddy of great chorus pedals. Mooer makes a great clone of it called the Ensemble King, listen to his tone at about 2:30 to get an idea of how to get a police tone:
The only weakness with a CE-2 style pedal is that the sound is very one dimensional. It only really does one thing, but I have one more suggestion in your price range that might do the trick:
Another option, similar price range, would be the Xvive V8 Chorus/Vibrato. It's not based off the CE-2, it's kind of it's own thing. I'd argue it's better than the Mooer, if only for the versatility that the Chorus/Vibrato knob brings, so you can use it for AS and a LOT more:
I wouldn't suggest the EHX Chorus pedals for what you are looking for. They are very dark and syrupy, whereas an Andy summers tone requires a lot of brightness and clarity with a slower rate.
The main difference between his Flange era and his Chorus era should be apparent, even through the examples I've posted: Chorus is a much subtler effect. Even at it's wateriest, a flanger is always going to fully colour the tone of your signal, while a chorus is much subtler. I prefer the Flanger for the tonal accuracy, but yet I kept the chorus on my board as I moved on, musically.
Source: I played a set of gigs with a band where we played only Police tunes. I got addicted to time based modulation effects, and spent hours researching how to get his sound 'right'.