I am working on a project for someone else and trying to find a few bulbs of this plant. I will gladly pay the shipping if you can spare some.
Clayton near Saskatoon
Here is a link that might be useful: My Blog
I have Eranthis hyemalis, but this was their first year ( planted last fall ) and the foliage hasn't quite died down yet, probably because it's been so wet..
I've seen at Botanus that they have the Eranthis for a very reasonable price, and
they always send good healthy bulbs. Maybe this will help?
** I'll check out your blog too!
Veseys in PEI carry them. It says zone 4 but I have had one that faithfully comes back for about 10 yrs now. Just check their catalogue on the net.