Women are commissioning parents. Women, along with either a male or female partner could commission another woman to have a baby for them.
It's unlikely, given their biology, but it's possible and I would find that as unpalatable as two men doing it, possibly worse.
A lesbian couple can buy eggs as well as sperm, as do heterosexual couples. It really has nothing to do with anyone's sexuality but everything to do with their biology and fertility and Mrs DV is right, these two men aren't infertile but due to their same sex relationship they are missing two key parts of what makes and who births a baby.
The key point those who accuse posters here of homophobia appear to be making is, because of their sexuality, they are entitled to hiring the woman for the use of her reproductive system because they have a right to a family.
Why are same sex male couples treated differently to other couples, would you have lesbians and heterosexual couples buy babies?
And if anyone can do it are you ok with the transactional nature of a baby being created and born like this?