Toilet manufactures don't make the handle hardware. The Eljer Titan uses the same handle as the Toto Drake.
They also don't make their own fill valves, flush valves and flappers.
A generic handle can be used from a hardware store. You might need to bend the brass rod to fit.
Some like the Ultramax can use a side mount Eljer replacement.
If not, I sell the handles in the Seattle area for $19.99
Remember, hardware items are just that.
Of the thousands of TOTO toilets I've sold, I rarely get calls for handles. But when I do, I can get them.