I've always been able to get these OE looking capacitors at the local Car Quest. In a pinch I've used a .47uF 200VDC capacitor out of my electronics stock. Doesn't "look" right, but accomplishes the same thing.
1960 GMC Panel w/ 305 V6, 4 Speed TV Repair Van "The Monitor Lizard" 1961 Chevy Apache 20 283, 4 Speed, Hydrovac www.picturetrail.com/starchief