Got an old eska engine that I've been looking for a new coil for. Model is back from the 60s I think..

It ran this time I took the pic, but really sluggishly. Back at the house I couldn't get it started and tried a ton of things. Finally checked the spark (duh) and can hardly see a thing. New plugs obviously, too. I think it just finally gave out.

Anyone know where to get a coil?