Original poster: Ben Haylett <bhaylett-at-shaw.ca> Currently there is a Maxwell 31159 type capacitor for sale on eBay, item # 3821145096. The specs are: .149 uF, 50 KV, .02uH. I'm not familiar with the type 31159, but it sure looks like a pulse cap to me. Current bidding price is $30.99. They'll only ship within the USA, and unfortunately I'm in Canada, so I can't bid. Ben