If it's a small group you are showing to, why not use an iPad connected to an HDTV?
Simply save your images at 1080x1920, renumber them in order and transfer to your iPad. On an HDTV, photos don't look too shabby, IMO!
What about simply taking your master files (of course, I'm assuming these prints are from digital files), print them as smaller images and then have them bound as a book that you can take with you? If they are silver or C-prints, you can easily copy them with your digital camera and then optimize them for electronic display.
I've given up several years ago in matting or framing my work for a presentation, unless it's for a show. Sometimes, large images with wide borders work fine with push pins in the corner. My audience isn't hung-up on framing or presentation, they want to just see the photos!
I don't have the money, time, space for all the boards. My way of showing work is either as a hand-made book, on the iPad as a presentation that can be both viewed and projected/connected to a HDTV, as an 11x8.5 folio (as in Lens Work and Dane Creek), or in a group, as a finished image presented two at a time with my reusable standardized presentation boards (30x20 Sintra board with dual window openings and photo corners that allow swapping out my prints quickly and easily).
Most people viewing your work couldn't care less that they are your special portfolio and 22x28, they really want to see your work and as long as the color and contrast is pleasing and not harsh (unless that's your style), how you share isn't as critical as simply sharing the work.
Another thought is to create a large Blurb (or similar) POD book. The images will be pleasing color/tone and won't have the depth of the original but how many of your audience would ever know?