My answer is similar to egreg'segreg's but egreg is quicker...
\documentclass[a4paper]{article} \usepackage[T1]{fontenc} \usepackage[utf8]{inputenc} \usepackage{lipsum} \usepackage{endnotes} \let\footnote\endnote \begin{document} \footnote{\lipsum[1]} \footnote{\lipsum[2]} \def\makeenmark{\hbox{\theenmark}\quad} \theendnotes \end{document} 
Or for flush left numbering, use
\def\makeenmark{\makebox[\parindent]{\theenmark\hfill}} 