I don't know of any roses named Maureen. It seems to me that there are many companies that will supply a rose with a label with name of your choice. Having said, are other members of the same opinion. The only Maureen I know of is a clematis which is grown by Thorncroft Clematis Nursery in Norfolk.

Someone asked a similar question back in 2009 - some answers in the link below

https://www.growsonyou.com/question/show/6038-are-there-any-plants-bulbs-or-shrubs-called-maureen

This is all I can find:

Maureen Roses: The Maureen Rose is a lovely medium to large headed cream rose. Maureen Roses have a medium petal count, strong stems and a good vase life.

http://www.wholesale-rose-directory.co.uk/maureen-roses.html