Seat belt extender for 2nd row

[stonatox5]

Hello all! I'm new to this forum and new to BMW. I live near Toronto and just recently purchased my first...an '06 4.4. My wife and I both love it but as usual, all of the little annoyances that come with any car are coming to the surface since a week has passed.

I've got 2 kids in booster seats. They've just recently learned to put the seat belt on for themselves...until we bought the x5. Now we're going backwards and having to put it on for them. As you all may know boosters partially cover the receiver. The passenger rear is ok because we can use the center receiver which sticks out. But the driver side is embedded. So what I'm trying to find is a source for a safe extender. Searches have brought up many that look very cheap (my favorite is the one site that states upfront to return the product immediately if you find any defect...umm, not really what you want to hear). If any folks have touched one or can point me in the right direction I would be a happier newb. thanks!