INSTRUMENT CO-TRAINING

That works even better if you're training under the same instructor and ride along in the back on each other's training flights.

Here is a link to AOPA's flight school finder. Once you get a list in your area try calling, visiting and or posting for pilots that may be interested. 

If you are an EAA member  check out their SAFEBOOK.

Also, look into the local IMC Club. There are others like you learning about IFR. 

Another approach if you a have a home simulator…Remote Training!

One thing to beware of if you are trying to build Cross Country PIC time.  If you are flying under the hood with a safety pilot, only the pilot who makes the takeoff and landing can log Cross Country.  As for PIC time, the safety pilot can only log PIC time (of SIC time, as appropriate) while the other pilot is under the hood.

Kristian,  I agree with you, in practice.  However, the FAA issued a letter stating that both pilots can always log PIC time if they agree before the flight that one pilot will log as "PIC Sole Manipulator of the controls" and the other will be the "Legal PIC of the flight", accepting all responsibility re FAA violations, insurance, etc.

I disagree with the FAA on this.  But, who am I...  I discourage this practice.

Great idea.  For learning benefit, more than about time building.  

You should have one fly the route, then switch seats and do it again.  You can also do mock oral exams, to practice verbalizing your answers.  Again, take turns.  One of my students, who passed yesterday, got a lot of benefits re the oral exam doing that.

Keep in mind, that if neither of you are CFII or Instrument rated, you won't get the best guidance, etc.