Help!! Need to find some electrolytic cap!!

[fredv]

I am looking some replacement caps but don't have any luck to find the
exact match. Here are the descriptions that I have:
1. 40-20/500V
2. 20/40/40-400/350/350V

I know that I can use the higher voltage one but not the lower.
My question is, can I use 2 of these to replace the above:
https://secure.tubesandmore.com/new/...C-EC4020X2-525
to sub #2?

Essentially, I will waste the 2 sections on #1 and section on #2. Will that work?

I am also looking for some coupling cap .1 mfd 400V. Will this work:
https://secure.tubesandmore.com/new/...item=C-PD1-400
or I should better go with this:
https://secure.tubesandmore.com/new/...item=C-HD1-400

Thanks in advance!!!