I would like a 30" square corner shower enclosure with clear glass. I would really like the door to be a bifold.

That is going to be a tough find. Presuming that you mean 30 inches x 30 inches from each of the two walls:

1. That is smaller than typical, and
2. A bi-fold is also very uncommon... and even if you found one, you'd have only a bit more than a foot per panel on the bi-fold.

For a special case like this, you should go to Lowe's or Home Depot to have their person in that department look through their special order catalogs.

If you can get away with a bigger enclosure, there are many options available at lowes.com and homedepot.com by searching "shower enclosure"