Adcom GFA 555 parts

I am having trouble sourcing

.1uf/850V Roederstein MKP1839HQ

to go across AC side of each bridge rectifier using multi-stack or piggy-back crimp connector (optional). This information is on the ADCOM GFA 555 POWER AMPLIFIER upgrade modification.

can I use something else?

I also cannot find .1uF/850V Roederstein mkp 1839 hq to go across AC side of each bridge rectifier using multi-stack