I searched for close bowshocks after some of our volunteers found a close bowshock, which belongs to Alpha Crucis. I found 3 new bowshock candidates and 3 bowshock candidates that are already in a bowshock catalog (Kobulnicky+, 2016).
Alpha Crucis is the only bowshock that is in the Milky Way Project (subject link).
Here the bowshocks sorted after the distance of the driving star:
Beta Crucis (2nd brightest star in the image)
distance: 85pc sp-type:B1IV image: WISE
Alpha Crucis (new)
distance: 99pc sp-type:B1V+B0.5IV image: spitzer
distance: 112pc sp-type:O9.2IVnn image: spitzer
Theta Carinae (new)
distance: 140pc sp-type:B0Vp image: WISE
distance: 150pc sp-type:B0.3IV image: WISE
Epsilon Persei (new)
distance: 195pc sp-type:B1.5III image: WISE
Zeta Ophiuchi is the most massive stars in this list and the only that is not a spectroscopic binary. Zet Oph is a runaway star that was once in a binary system. The more massive star exploded in a supernova and Zet Oph was kicked out of the system.
The other runaway stars are still binary systems, so their origin is probably not a past supernova.
Theta Carinae belongs to the cluster IC2602. Other stars of the cluster do not show bowshock activity.
Update 27 April 2017:
I found another 3 new bowshocks that are close:
Alpha Muscae (new)
distance: 97pc sp-type:B2IV image: WISE
Tau Scorpii (new)
distance: 145pc sp-type:B0.2V image: WISE
Sigma Scorpii (new)
distance: 214pc sp-type:O9.5(V)+B7(V) image: WISE
Alpha Muscae does have a small bowshock for this close distance.
Sigma Scorpii does have a very bright bowshock that is also visible in the w3-channel of WISE. This way it appears yellow.
Tau Scorpii does not have an evidence for a companion that orbits the star.
The final list:
*bet Cru 85 pc B1IV
*alf Mus 97 pc B2IV
*alf Cru 99 pc B1V+B0.5IV
*zet Oph 112 pc O9.2IVnn
*tet Car 140 pc B0Vp
*tau Sco 145 pc B0.2V
*del Sco 150 pc B0.3IV
*eps Per 195 pc B1.5III
*sig sco 214 pc O9.5(V)+B7(V)
Zeta Ophiuchi is probably the most massive and youngest star in the list (19.8 solar masses and 3 Myrs young).
Alpha Muscae is the less massive star in the list with 8.8 solar masses and the oldest with an age of about 18.3±3.2 Million years.
Most of these close Bowshocks belong to the Scorpius-Centaurus OB Association:
Epsilon Persei is probably the only bowshock that does not belong to this Association. I did draw the general direction (no precise measurement) of the bowshocks as red arrows in the graph. As you can see: The Lower Centaurus-Crux subgroup does move in one direction. None of these members should have a supernova origin. The Upper Scorpius subgroup is a bit messy and maybe more than Zeta Ophiuchi might have a origin in a supernova. Especially Delta Scorpii might be a system that was near the zet oph sytem when the more massive star exploded in a supernova. Zet oph and del sco point in two different directions.
Here the Lower Centaurus-Crux subgroup:
And here the Upper Scorpius subgroup: