Steering UJ

Hi everyone,
I noticed last week that the lower uj joint on my steering shaft was shot (has got loads of free play in it). I ordered up a new one but when i went to fit it i found that it was shorter in length than the original and therefore will not fit. I need a longer uj for it to fit, has anybody encountered this before or know of what part i may need?
Thanks,
Matt

Check that you have been sent the right part! Are the top and bottom uj's different lenghts?

What are you driving and what part number did you order? Pics always help

Top uj is NRC7387
Bottom uj is NRC7704
Fur 1987 onwards