I received a card at my baby shower from my DH's two cousins with a picture of the convertable car seat that was on our registry. It said that they had purchased it for us, and would get it to us soon. I wrote all of my thank you notes the week after the shower, but didn't write the two for DH's cousins. Should I wait until I get the carseat, or go ahead and send the thank you note when we haven't gotten it yet?

I orginally thought to wait until we got it, but now its been 2 weeks since the shower and I'm just now sure now.

What would you do? Write it now or wait until we get the gift?