I remember a few companies releasing genderless/androgynous bodies in the 70cm range over the past couple of years, but I can't remember who it was! All I really remember was the height, the torso looking more male, and the crotch area was kind of just smooth like a Barbie doll. I think the Switch Labyrinth body was the most popular one, but I remember seeing way more, I just can't remember the companies!
Luts offers their androgynous Muse body in 44, 64, and 70cm sizes. I think that may be the one you’re thinking of! It’s like the Labyrinth but with a more masculine chest and narrower hips.
Asai studio has a really pretty slim body in that size range that has a smooth part you can attach, I think. Not exactly the same but it's a nice option and readily accessible.
Telesthesia and Dragon dolls have the entire front of the crotch magnetically detachable (let me know if you want a reference pic) so you could sculpt your own blank piece or just leave the phallus piece detached.
I’ve also been searching for a body similar to Switch Labyrinth, but msd size. While looking around on Dollsphere I found some in the 70 cm range. There’s KDL "QingHui" 68 cm. Abidoll have two, 72 cm and 75 cm. Dollzone have their 73 cm uncle body. I guess the first one from KDL are the most similar looking to the Labyrinth body.
Very different price point, but can I suggest the Twigling body with the A bust. It’s very flat, and if you want a curvier waist, you can do the short hip, or the long hip if you want a more streamlined silhouette here is a pic of three of the body options Twigling has—the first is A-bust/Long hip/long leg (~68 cm), which is in my opinion the most androgynous, the second is B-bust/short hip/long leg (~65 cm)in case you’d like a curvier waist, the third is b-bust/long hip/short leg (~62 cm). I don’t have it in this photo, but short hip/short leg is a very curvy 60 cm doll, and a little hard to dress, but lovely. Twigling bodies by Indifferent Red, on Flickr