Anyone rebuilding a 45rpm RP-190 or RP-168 RCA will usually have to replace the drive wheel because it has deteriorated or dried out so the unit will not operate properly. Because our company services many RCA 45's, we manufacture our own idlers.  Now that they are becoming hard to get, we have decided to offer Two models of idlers to our Ebay customers.It is necessary to send in your old wheel as an exhange .  Down time is around two weeks.  
Just pay for it on Ebay and ship it to Faber Enterprises, 9512 Quaymas Ct., Elk Grove, California, 95624.
It will fit most 45rpm players. .Be sure your idler looks like this before purchase.The same goes for the idler for Under Dash players for automobiles.  These are RCA-AP1, ARC-1000, ARC-2500 and other private label players.
Exchanges are sent to Faber Enterprises, 9512 Quaymas Ct.  Elk Grove, CA.  95624