If you want to try the plastic bearing, here's Delrin ones, 10 for $6 (+$2 shipping) - incase you have more than one 1050, or want spares.
http://www.ebay.com/itm/310209291561?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649
They weigh the same as the $6.75 ones above, but other than that I don't know. Ordered some to try.