I would suggest Heirloom designs...Sew Beautiful has some and also Martha Pullens site.

I just did a dress for our grand daughter using files from Martha Pullen's Internet Embroidery Club. It was in the 2011 club files. You can join any back year & still download ALL the files from that year. It turned out beautiful! I did put a pic of it in project, but that was pretty far back. It's worth every penny to join her IEC as you get really good designs & lots of them. When you get to the site look for the embroidery club.

Martha Pullen designs woyuld be my first choice.

I would look at Louis Meyer

On the Secrets of Embroidery site, look for the vendor My Fair Lady. Some of their Princess and Cinderella designs are very delicate. The link I'm attaching is a page where there is a christening gown at the bottom of the page. There's another one, too... I'll keep looking for it.

Here's another link.

The Granny's Hope Chest designer has several design sets for Christening gowns.

in DBC there were some small crosses a while back. try the search button on the right.

Try From the needle of Anne (FTNOA)
Her designs are so delicate and would be just beautiful on a Christening gown . There are many many free designs to suit. You can also access her designs through opw. hugs Helen

thank you for the ideas for beautiful designs!