Defender 300tdi Steering box replacemnt part

Hi all
where are you buying your replacement steering boxes from, Mine needs to be replaced and is an Adwest one 4 bolt.
I would like another adwest one, but am unsure what gets sent out when you get a remanufactured one.
any advice welcome.
Thank you all
Ray

I had a remanufactured one from paddocks not long ago and it leaked from the pinion, sent it back and got another which was set up completely wrong and sucked air in, third time lucky and i had a decent box. I would pay the extra money and get a brand new box for piece of mind. Part number for the box is QAF500110 google it and find the best price.
Cheers