I am looking for a replacement toilet tank lid for a Eljer Preserver II toilet. Manufactured in 2003.

You can purchass a whole new fixture for the same cost as just the tank I believe...
any eljer tank will fit your toilet bowl... they are pretty universal.
Does the current tank have a crack or something?you can replace the seals easilly enough if the tank is just leaking at the seal ... and the flush mechanism is also easy to replace , should that be the reson to swap out tanks too.

recheck flapper may have replaced it with wrong one

you can find tank on amazon. take a look here Amazon com Eljer tank enjoy

Toska seat is called Manarque seat, for the Herbeau toilet.
I searched for square toilet seat.

Site shows toilet seat for the Herbeau $135
http://www.bizrate.com/miscellaneous/herbeau-toilet-and-toilet-seat/

http://www.faucetdirect.com/herbeau-0651-monarque-elongated-toilet-seat-with-cover-and-finish-matched-hardware/p671327?source=shz_671327&aid=228165868


Pdf from Eljer showing Tosca toilet looks very similar to product shown on links above.
1.6 gallon water-saving flush tank.
http://dallas.eljer.com/Products/Toilet/CatalogPage/0912000.pdf

Look for cracked ceramic at gaskit joint might need to replace tank..I did after weeks of trail and error.

http://www.eljer.com/productDetail.aspx?id=2506

The Problem can be fixed by fixing a new flush meganisum to your cystern, sound like the old flush rubber is stuck in the cloused posision, have a look by taking the meganisem of, if so replace it .

lift the lid,and look, flush, the rubber valve that opens when lever is is pulled should float, so either its very loose or broken and needs to be replaced.plz rate-bozcro

If you take the lid off the toilet there is a cartridge in the middle of the tank. if you take the handle mechanism off the toilet and get some plyers you can take the cartridge out of the tank by twisting it out. make sure the water is off and that you have pressed it down ( the part that stick out of the middle of the cartridge)to relieve the pressure. it should come right out and take it to a local plumbing supply shop and they should be able to get you a replacement part for it.

I believe you will find it cheaper to replace the whole toilet. good luck