The spectroscopists amongst you may be using the MILES database as a source of reference stars for finding instrument responses.
I have created an observing list of the bright (mag <= 7) stars in this dbase with A or B spectra which are suitable candidates. By plotting them in a skymap with alt-az coordinate system (see image), you should be able to see a suitable candidate at the same altitude as your target.
The list also contains full spectral id (gleaned from Simbad) in the ‘comment’ field, which can prevent the pitfalls of choosing unsuitable outliers in the A/B grouping (stars with extreme luminance or spectral peculiarirties).
I couldnt see an easy way to attach the list, but I can supply to anyone interested by personal comm. I