the ts570 takes a vs3 synth chip.
did you mean ts2000 when you wrote ts200? the ts2000 takes a vs3 chip as
well.
They are still made since the ts2000 is still made as far as I know.
Might be a little difficult to actually get one as they are probably on back
order, but recent discussion on the list indicated that at least one HRO
store had them in stock...I can't remember which HRO store though.
Do an ebay search, as well as a qth.com search, along with an eham search.
I'm sure you'll come up with something.
73
Colin, V A6BKX