imports on Plone 5

I have a Plone 4 site which I'm upgrading to Plone 5 + SocialIntranet. I forked the SocialIntranet buildout and added my custom products. Ploneboard and collective.embedly are throwing an error on startup about:

File "/home/zope/socialintranet/eggs/Products.Ploneboard-3.6-py2.7.egg/Products/Ploneboard/browser/", line 7, in <module>  from import ControlPanelForm

Looks liks there's no longer a in What's the right way to fix this import so that I can use these products in Plone 5?

Plone 5 controlpanels do not use zope.formlib anymore but z3c.form. You'd have to update the addons, to also use z3c.form. Example Plone 5 controlpanel:
That goes also hand in hand of using to store the settings.
If that is not an option, I'd copy the over to your projects and import it from there:
I'm +1 for modernizing the code but that would break backwards compatibility unless you are willing to invest some extra effort to write compatibility code.