Flush valve replacement

[curegeorg]

1pc toilet with no brand name on it. Flush valve has CISA fileNo 3564 on it. Toilet lid has 3395 C15A Made in China.

The valve is a top mount into a 2.5" hole. It has a tabbed plastic nut that threaded on from the bottom through the valve and pressed the thin L shaped gasket tight.

I described this to several local supply houses and showed them an installed picture, but none knew what it was. One is checking with American Standard, but based on that 3395 model number and a flush valve that looks similar.

From what I have seen it most resembles an Eljer 495-5515-00, but no info on what size hole that fits.

What brand/model flush valve do I need to get? Also, the gasket is where I think the problem is, can I get that separate or is not even worth it?

Thanks.

Here are some pics:

 

[Peanut9199]

Pictures are really bad, the top picture the fill valve on the left kind of looks like a "Korky or Hunter"
Your best to take a picture of the whole toilet.
Kohler had a 1pc toilet K-3395 San Raphael
http://www.designtool.kohler.com/us/detail.jsp?item=246902

 

[Sponsor]

 

[Big Walt]

I have that same toilet. Have you found out who made it? I need to replace the flush valve as well. Its leaking water into the bowl. Please let me know what you've found out about it.