Sounds like you are looking for a “single storey” a.

Century Gothic is very similar to avant garde.

Futura is a good font to invest in, in my opinion. I have found it very useful over the years.

You could also try something with a slab serif, like Geometric Slab 703

Chalet from House Industries has a retro-modern feel to it.

That’s super helpful, Kate, thanks so much!

http://www.dafont.com/theme.php?cat=501&page=1&nb_ppp_old=10&text=single...

Just have a look through the sample text to see which ones are single storey ...

D’oh, great idea, Edward! Why didn’t I think of that! :-)

Have a great day, guys! You’ve solved my problem!