BGOGO sale with some variants of products

[MarkyMarkMark]

I want to create a BOGO sale and only have some vairants available for sale as i have excess stock of 1 colour in a number of products and want to clear it out.  I found an app called BOGOS that allows me to create the sale correctly with individual variants but im now stuck creating a collection or a link with only those variants so i can advertise and market the sale properly on my website and via email. The BOGOS app doesnt create a link of sale items to be emailed or create a banner with 

Does anyone have a suggestion or work around or an app that will allow me to get this done. 

Im hoping there is another app that will allow me to create a link from the sale