I've attached a picture of the species of phi I'm referring to (although I'd prefer something with less head and more stem). Is this living in some package out there?

I've attached a picture of the species of phi I'm referring to (although I'd prefer something with less head and more stem). Is this living in some package out there?

You could take the normal \varphi and, if in pdflatex, \unslant it.
\documentclass[a4paper]{article}
\usepackage{mathptmx}
\newsavebox{\foobox}
\newcommand{\slantbox}[2][0]{\mbox{%
\sbox{\foobox}{#2}%
\hskip\wd\foobox
\pdfsave
\pdfsetmatrix{1 0 #1 1}%
\llap{\usebox{\foobox}}%
\pdfrestore
}}
\newcommand\unslant[2][-.15]{\slantbox[#1]{$#2$}}
\begin{document}
\unslant\varphi
\end{document}
Based on my answer at Upright Greek font fitting to Computer Modern.
\varphi?? – Steven B. Segletes Oct 26 '16 at 00:58\varphito me, although a sans serif version. you've left us guessing ... – barbara beeton Oct 26 '16 at 01:32\upvarphifrom the upgreek package – Alain Remillard Oct 26 '16 at 01:33