ASM-1 Parts

[--M]

    Hey all I just recieved my ASM-1 PCB in the mail last week. I placed an order
for parts and was not able to find everything at mouser. I am curious about the

2N4856

    This seems hard to find can anyone suggest an equivelent replacement part? I
used Troy sheets parts list to place my order, this listed

2N4391

    Which are not on the parts list for that came with ASM-1?

    The schematic shows a pair of

2N3904

    I guess these are supposed to be matched. How do you go about finding a matched
pair?

Thanks

--M