DeviantArt user batman-n-bananas made a very fetching steampunk Portal gun. But what to wear with such a contraption? Why, mechano-Victorian long fall boots, of course, in which fancy modern tech is swapped out for reliable British steel.
https://lastchance.cc/what-would-a-19th-century-portal-gun-look-like-5891480%3C/a%3E%3C/p%3E
Steampunk Portal Boots [DeviantArt, via Fashionably Geek]