That's more do-able... I thought from looking at the parts list that this was a 3 section can, but from the schematic I see that there are only 2 sections, so that's better. one is a 160uf at 200v, the other section 200uf at 150V. I was thinking that I'd have to pair (2) 80uf caps to get the 160, and then 2 more at 200....(making a bundle of 8 to replace the 2 multisection cans....)
The way the parts list shows, I was thinking they meant: 160/200/200 @150V
This site is pretty good for multi-section can caps (if you're still in the market):
http://www.tubesandmore.com/products/capacitors
I have an old Scott Stereomaster 220 that needs a 30/30/60 uF @400V power supply cap. This site didn't have exactly that, but they had a 4x30 uF @475V, and using two of the 30 uF sections, I can get the 60 I need and still have the other two 30's. Odds are you won't find exactly what you need, but you might be able to do some combining of values to get there and maintain a stock configuration and look. One issue running high voltages in new places inside the chassis is crosstalk onto other lines in the audio path. Might not be as big of an issue for the SS c26 w/ PCBs (I don't know about the voltages in there), but for the Tube, point-to-point Scott, caution is required and I believe keeping everything in it's original physical location (when possible) is worth doing.