My husband and I are using a sperm donor - so we have similar decisions to make.

To answer the question about using the same donor - if we decide to go again I will be using the same donor. We have his sperm in storage at the IVF clinic we used. I would prefer this so that the children know that they have the same biological background.

To answer the question about known donors - we were very lucky that we had a friend that was willing to help us out. Our FS recommended asking people that we knew, although this friend stepped forward before we needed to start asking around.

Your other options are asking a family member (which unfortunately didn't work out for us) or I *think* there are advertisements in different newspapers.

I know there is a site for egg donors - not so sure for sperm donors

Hopefully that's been of some help.