They are Mepco/Centralab 3186DE193U075BPA1, 19,000 uF @ 75 VDC 95v surge. Sadly I'm sorry to inform you that these are proprietary Caps!! I found out the hard way as mine are all leaking and they will not sell you the caps through any parts supplier I have tried for a month. the lead spacing is the issue to fit the PCB. I'm currently working on a "work-around" for this. You can buy many caps that meet all of the specs--problem is the dimensions. Aragon obviously was quite aware when they designed this into what when working is an AWESOME Amp!!
I will perhaps post my fix if there is interest.
Cheers, pgkhorn