In the past, USCIS and some immigration attorneys believed that you could not become a naturalized citizen if you did not have a valid green card (LPR) card to bring with you to your naturalization interview. This is in error. USCIS will allow someone with an expired or lost green card to naturalize and become a U.S. citizen.
So save yourself the time and expense associated with filing the I-90 to get a replacement green card. If you are eligible for naturalization, this issue will not derail your application.