Need Isolated 4 channel oscilloscope

Looking for isolated input oscilloscope. 4ch. Seems there is not update/replacement to the TPS series? And there are only 2ch versions left available?

You are correct, the only isolated input scope we have now is the TPS2012B which is a two channel scope. There can be options to use high voltage differential probes on a non-isolated scope, which give you two isolated 4mm banana jack leads to work with. We have options going up to 200MHz BW with the probes.