PIO's just use a film cap of the same size and 600-630V. I used Orange Drops, Cornelll Dublier DME's in a lot of spots (they are small), and DMT's (a little larger).
As for Electrolytics, Nichicon UPW, UKL, UHE(radials), and TVX(Axials). These will be consistantly 60-70% smaller in size but work quite well in the sansui's. Plus the added bonus of less cost than Sprague atoms. UPW/UHE's for Power supply and non signal path, UKL for Signal path. Get 105*C caps. The sansui makes plenty of heat.
Some advocate the UFW/UKW series. Up to you tho. I don't hear a difference.
As for the can caps, you should be able to stuff the C003 and C004 (20uf/300V) voltage doublers with 470uf/450V caps (Nichicon). As they are single caps, no problem. The Multi-cap's I don't have a clue right now as the numbering is different from most I've seen. Most Co's you can look at the parts list and figure out real quick what you needs are. With the SANSUI you have to look at the actual cans to figure it all out. C-004/005/006/007
MAY be in the same can. If so you can use a 40-40-40-40uf / 525 V from CE (
www.tubesandmore.com). But you'll have to figure out the can's on this one. I'm going from memory on the 1000A and comparing that with the 500a which is very similar.
In any event write down the value's/voltages of all the can's The two singles are the voltage doubler and could use some stiffening. (470uf/450v). If you can't find anything in current production that will work,
www.hayseedhamfest.com makes custom value/voltage can's. I used them for the 4 section can on my 1000A. Took about 3-4 weeks depending on whether he had that combo in stock or had to have it built to order. TOM is good people and his product is good, prices fair. I get all my can's for my FISHER's from him.
Good luck
Larry