The easiest way to replace it is to call John at ERA and have them send you a new one (in exchange for a few $). If really frozen the first thing I would do is remove it and get some Sil Glyde and try getting it to moving again to re-use. You can buy it on Amazon as well as NAPA.
https://encrypted-tbn1.gstatic.com/s...N-nPA&usqp=CAc