2 boosters and a baby bucket seat in a Nissan Versa hatchback?

[loveandgarbage]

Hi, everyone. I swear there used to be (or still is) a website that cataloged different carseat configurations for cars but I can't find it! So I turn to you.

Baby #3 is on the way very soon and I really, really need to deal with the carseat issue. We are planning on getting a minivan in the next few months, but for the time being, I need a solution. My 6.5 yr old is in a backless booster, my 4.5 yr old is still in his britax convertible and the new baby I would like to have in a bucket seat for convenience (but would consider a convertible if that's my only option, of course). My 4.5 is eligible for a booster though if possible I'd like to keep him harnessed. Looking at the backseat now, I cannot fathom how I could fit a third seat in there, but maybe with two boosters there would be more room.

Any thoughts for me? Thanks!

[physics girl]

In general, boosters need more available seat width than harnessed seats because of the challenges of buckling in the seatbelt every time your child gets in the car. You'll probably need to look for a very narrow harnessed seat  for your 4.5 year old, a narrow booster, and a narrow baby bucket. (I know the Snugride 30 is affordable, narrow, and fits newborns well.) Radians are narrow, but they aren't included on the list of seats that Nissan has tested and successfully installed.(http://www.nissanusa.com/snugkids/)
 

[DahliaRW]

The Britax may actually work well in the middle.  It's up high, so would allow the boostered child to reach down to buckle easier.  You just need a bucket or convertible that will fit under it on the other side.

As far as boosters, the harmony literider is a backless booster that is really quite narrow and it might work. 

[loveandgarbage]

Thanks ladies! I'll look into the seats mentioned.