your best option is as Laundress has addressed.....purchase a spinner, and the you won't have to worry about any machine you get as to spin speed, or the hassle and expense of locating and changing parts.....seems to be the cheapest alternative in the long run.....
I was thinking of getting one, but then remembered I have 3 TwinTubs, with high rpm spin speeds, and they remove a substantial amount of water from any load out of a regular TL machine.....
you could look into a TT as well, a new toy to play with, and a spinner to boot!