Absolultely its possible. Get a wheel from a junkyard: $50 or so, off another Gen I.
Send it to American Stitches. For $400, You can have a wood steering wheel that matches your interior perfectly.
or, use the old wheel as a temp replacement, and pull your current one off and send it in if it doesnt match.
because IIRC, the Lexus OEM wheel is like $800.
You could also retrofit a later model wheel, BUT, your features like auto tilt and other things wont work. plus i believe the cruise is on the wheel on 98+ models.