I am guessing you want a sliding door because you don't have room for a big swinging door, right? What about having a glass shop make 2 narrow swinging doors? That might be easier to fit in your floorplan & would give you a wider opening in & out of the shower.

I also like the bifold doors that lazygardens linked. Those are cool.

I must respectfully disagree that 25" is too little for a shower entrance. Two of my bathroom doors are only 24" wide and that has never been an issue (except in maneuvering a vanity into the room). It seems to me that if 24" is sufficient for entering a bathroom, it would be sufficient for entering a shower.

I would consult a local glass shop. They may want to add some sort of framing or support to the sides. That, along with the overlap in the middle, means that the opening may be less than 24" wide.

You may also want to look into a sliding door with three panels. I put one into a tub/shower combo to make the opening wider so that someone taking a bath wouldn't feel so boxed in.

Here is a link that might be useful: Triple Slider

This one is good for 42 - 48 inch openings. Can you put in any sort of filler that would take up an inch?

Here is a link that might be useful: 42 -48 inch sliding shower door

pricklypearcactus - some of my family is linebacker width, or basketball player height. My immediate thought on any design is, "Would Uncle Don be able to use that without touching the sides?"

Dreamline shower doors are very inexpensive but the quality is great. We have used these before and they very nice and easy to install. There are many sizes available. I have created a link to one that will work for your needs.

Here is a link that might be useful: Shower Door opening 47-3/4

At a local kitchen/bath/plumbing store I checked out Basco quality and could see samples of the metal finishes and glass. I shopped online for my sliding door for a shower/tub by Basco using this site below. I priced it there but ordered it from Lowes special order (they order it for you, no charge) & you can get a 15% off Lowes website coupon for anything in the store...it's for moving but you are moving things around, right? At this link on TheShowerDoorStore look for the Infinity 4400-4500 as it has the 48 inch width. Maybe all of them have that width. The Swing Doors with Inline Panels look great.
The quality of my Basco door is excellent. My sister has a Kohler Sterling sliding shower door and it is very wobbly and not as high quality.

Here is a link that might be useful: shower doors, sliding or inline

Thanks for all the advice. In the end we decided to go with the custom glass. It was the best solution with our layout (I don't think any sort of swing door option would have worked) and the designer was willing to take on the cost and the GC took on all the stuff with the order from the glass shop. Hopefully the shower doors get installed today.

How expensive is the custom glass compared to the over-the-counter option?

Here is a link that might be useful: bathroom suites