I'm confused about what you are inquiring about, what you have in the picture is a fixed sight Vaquero. Only Blackhawks have adjustable rear sights. I supose you could have a custom gunsmith install hi vis adjustable rear sights on your Vaq, but ya just as well get a Blackhawk instead. It would be much cheaper.
I meant to ask if anybody had high visibility adjustable sights on a short barreled "birds head" like I have pictured in my post above. Sorry for the confusion.
I guess I could just photoshop something together to see how it would look. The one I have pictured above does shoot very well but I'm having more and more trouble seeing that front sight in the u-notch these days.
This one started life as a Birdshead but I switched that out for an aluminum gripframe to lighten it up.The high polish sights were very hard for me to see,especially in sunlight,plus they were off considerably from point of impact.
I had Jim Stroh of Alpha Precision install the S+W rear and his ramp front.Not a Birdshead but it is short barreled.
If you plan on installing adjustable sights you might try having the rear sight opened up a bit first. I think it gives a better sight picture but you could possibly lose some accuracy as the sight picture won't be quite as fine. But I would guess at the distance you are using your gun the accuracy would be just fine. I have shot a couple of Montado's with the rear sight opened up and it makes a world of difference in finding the front sight.
I know what you mean about old eyes. You received lots of good ideas above. I remember old Skeeter Sleton saying that he could shoot long barreled guns better. Not because of the longer barrel but because of the longer sight radius. But I like short barrels so I widened the rear sight notch on both my target sighted Blackhawks and my fixed sighted Vaqueros. What an improvement in sight pictures! It's like I was looking thru the sights of my long barrelled guns. It had the added benefit on the fixed sight guns of allowing me to adjust the point of impact for windage on those that were a bit off.
I also put a white line down the center of the front post for a more precise sight picture. You could try those things first and if you still need improvement, than resort to adjustable sights. But you may still want to widen the notch in the rear sight blade a bit; it helps with short barrels.