Hi Steve,
Your UV Aur spectrum is very similar to one I took of this star back in Feb 2015 which is in the ARAS database at http://www.astrosurf.com/aras/Aras_DataBase/Symbiotics.htm. Looking back at my records, I used HD39357 as a reference star then but today I would check for a suitable Miles star. There are several more recent spectra of the same star in the database so you could download these to compare with your current spectrum.
I haven’t observed V1261 Ori myself but I see there is one recent low resolution spectrum in the ARAS database worth comparing with.
David