A quick search shows Harrison style compressors are easily obtainable. First price that popped upwas$550. Remember that nearly all John Deere machinery used these style compressor so they are not uncommon.
But for $220 you may as well give it a go.
When I fitted my Sanden to the factory set up in 2000, the AC bloke said it would never be as good as the Harrison due to its lower capacity. He was probably right. But that leads to another point, it seems everyone’s AC bloke has different opinions.
My AC system had sat open for who knows how many years and i has no drama with either the condenser or evaporator.