Lowther Acoustic 115 driver thoughts

Looking for suggestions for a uniquely built Acoustic 115 cabinet. The opening is 7 1/2" and the depth is 2 3/4" or 7cm. With a large magnet one cabinets depth is reduced even more as the wires were run so to interfere with a large magnet driver. I made spacers for some Audio Nirvana 8" drivers spaced 1 5/16" out but not really the look I was hoping for. Any quality drivers that anyone can think of that I can get away with no spacer or a minimally thick spacer? Any suggestions I would be grateful.
Thank you