No, we buy radiuses bottom corner mattress for walk around beds. I think the bases might have been slower to change over. Typically we put the curves at the top in that situation. No one ever uses the top corner...pillow normally covers that area. Fitted sheets should still work.
What I would do is put a chunk of foam at the top, put the radius at the bottom, extends the length of the bed.
PLEASE do not send questions via Private Message, my inbox fills up too quickly. Post questions in the forum as a new thread so that other users can benefit from the answers. Use Private Messages for sensitive information only (VIN, Contact info or things you do not want the public to see).