Sorry I don't have any pics I can link to for you.
Maxillary impaction will not help you with a longer philtrum as you assume in your post. As a matter of fact it can exacerbate the look overall, if a long philtrum is the problem. Maxillary impaction looks good on people who have a shorter to normal length philtrum to start with. They are also likely to show more teeth or even have a gummy smile. The length of the philtrum should be evaluated relative to the remaining part of the lower face (if you measure from the base of the nose to the bottom of your chin, 1/3 should go to the philtrum and the upper lip, 2/3 to the lower lip and the chin - but you probably know this). Also, the lower third of the face should be evaluated relative to the face overall.
If you shorten your lower face significantly by way of maxillary impaction but the philtrum length stays the same (and it will, unless you have a lip lift of some sort), you may find yourself with an altered lower third ratios in an unfavourable way. I've seen this in people with maxillary impaction - their philtrum APPEARS to be longer even though strictly speaking it's not. It's all about ratios.
I had been considering impaction because I will have BSSO (advancement) and I feared that without any rotation to accompany the BSSO this will make my face look longer (and it probably will, I'm trying to prepare myself for this). But then when I considered how the lower third of the face ratio is altered by impaction and how less bone in the lower third of the face will mean less support for the soft tissue there (what you referred to as possible ageing effect), I decided against it.
I hope my explanation makes sense...
If you have a problem with a long philtrum, the only way to help it surgically is a lip lift. Or dropping your chin down during a lower jaw surgery with genioplasty, which will give an illusion of a shorter philtrum. But this will mean a longer face overall - it could work for some men, but not for all. If your face is on the longer side, definitely not a good idea. Mine isn't, fortunately.
