Hmmm, swap slides....
Well, good luck finding an actual BHP slide. From Browning, last I looked, they were $580, which is more than a whole gun costs from CDNN. Brownells used to carry them, but no more. Th elast time I did this, I bought a slide from Cylinder and Slide. It was used and refinished, and I got what would be considered a smokin's deal at $220.
As far as customizing our own, quite a few guys here have. I've done dozens, but I don't have pics except for one. I have two I'm currently working on. Here's a pic of an old one that I already sold. It's a T series Hi-Power with C&S trigger/hammer/sear/ambi safety, Cocobolo grips, Heinie Straight Eight sights, a carry bevel job, a 40LPI checkered front strap, a trigger and reliability jobs, and a matte reblue.
There are some alternatives, but no matter how you look at it, it would be quite pricey. Consider trading it for a non tangent gun.