Volvo 850 vs. V70 Does V70 have longer seatbelts?

[wildatheart]

This may seem an odd question, but are the seatbelts in a V70 mk1/mk2 longer than those in my 850? I am having a terrible time trying to fit a baby seat, as the seatbelts seem relatively short both in the front, and back.

If the belts in a V70 are longer, might it be possible to buy one to replace a belt in my car?

Many thanks for any thoughts.