James Romberger has an excellent personal history and analysis of David Wojnarowicz influence over at The Hooded Utilitarian with Wojnarowicz's Apostasy.  He includes a link to Wojnarowicz's last painting here.

I'm curious if Wojnarowicz had any contact with David Foster Wallace, and this speculation about originals and copies via Montevidayo from Joyelle McSweeney doesn't provide my answer, but defines interesting questions.