pairing two down rectangular bags different temp ratings

[jayjay]

I am hoping to find the following:  two rectangular or semi-rectangular down bags of different temperture ratings to zip together.  The idea is one very warm rating (45-50F), the other a little cooler (30-35F) fastened together as a double bag (for me and my sweetie) with some temperature flexibility.  If only a bit cool place the light side on top, if chilly place the warmer side on top.

Any suggestions for a company that has two bags of differenet weights that are compatable pairing up as above?

thanks

[PaulGS]

Are you sure you need two different temp bags? Your temperature range is quite narrow (only 20 degrees). 

Rectangular down bags are not that common and finding two different temp ratings from the same manufacturer may be challenging.

And welcome to TG! 

Edited September 25, 2016 by PaulGS