[Hallicrafters] High voltage capacitor source?

[Waldo Magnuson]

I'm in need of a few 650 v.d.c. capacitors (4 uf and 8 uf) for the  
power supply section in my S-36A.  Where/who is a good source?  Most  
sources end at 400 or 500 volts.
Thanks.
73,  Skip  W7WGM