I don't have the BM4000 circuit with me right now, but quoting from the BM4400 circuit (which is very similar IIRC), on the +35V and -35V circuits are 2 0.1uf caps, 1 between the AC and +35 rail, and 1 between the AC and -35 rail.
These are B40C800 (40V 800mA) or B80C800 (80V 800mA), which can easily be replaced with the 11DQ10 (100V 1100mA)
On the 15V circuit, those decoupling caps don't exist.
I'm working on a restoration writeup of the BM4000, and it'll go onto my website, but not just yet.
Menahem
Learn from the mistakes of others - you'll not live long enough to make them all yourself!