Does a 2 sided-corner gas insert exist?

That product does not exist yet. You could do a gas log system in the space.

What is the most economical unit you have that is a see-thru vertical fireplace?

Here is our 38" Napoleon Vertical Electric Fireplace We also carry some vent free gas fireplaces by Duluth Forge.

Do you carry an electric see-thru fireplace that is less than 40 inches wide?

The Dimplex Opti-mist Pro 1000 and Pro 500 are the only electric fireplaces smaller than 40". These products are very unique and require a water line to be plumbed to the appliance to operate. The flame feature is created by steam and a light strip. This fireplace has an optional heater. However, the Napoleon Clearion is a good option but unfortunately is 50" wide.

Do you have electric fireplace logs for a see-through fireplace?

Unfortunately, we do not have electric logs for see thru fireplaces.

What is your smallest see through fireplace insert?

Unfortunately, we do not have any see through fireplace inserts.

Looking for natural gas, direct vent, a see-through fireplace that has a depth of 32", a width no wider than 42", and a height no taller than 33". Do you have anything?

We're sorry, but we do not carry a see through fireplace that will satisfy your dimensions. Most of them are very much narrower than your required depth.

Do you have a vent-free propane see-thru model that is 10,000 BTU to allow for bedroom/bathroom installation?

No, we do not have any vent-free see-thru options at 10,000 BTU or less or a bedroom.

Is it possible to eliminate one side of a zero clearance "island" fireplace between a bedroom and bathroom?

Unfortunately, because of their configuration, there would not be a way to safely block a side of your unit. I apologize for any inconvenience.

We presently have a wood burning peninsula style fireplace. We would like to convert it to a propane with glass. Does it have to be vented or can it be vent free? Someone said there would be a safety issue.

For the unit you have you can use either vented or vent free. However, there can be certain local restriction (codes) that may not allow vent free logs in you town/city.