I get ours from several different eBay stores, and use different configurations depending on where the bulb is going.
Got these for the overhead light fixtures:
http://www.ebay.com/itm/291178793211?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
Used these in the bullet reading lights:
http://www.ebay.com/itm/2X-T10-LED-Bulb-1-5W-168-WHITE-923-920-192-904-579-WEDGE-LIGHT-464-T15-/271033808602?pt=LH_DefaultDomain_0&hash=item3f1adfb6da
Used these in the lights over the dinette (they face straight down):
http://www.ebay.com/itm/2-BBT-Marine-Super-Bright-19-LED-1141-1156-etc-Bayonet-Base-Conversion-Bulbs-/300966661638?hash=item461302ce06&vxp=mtr
Please note that some of these little devils from China can be a little difficult to get in the sockets, 'ya just have to work at it!
Good luck and happy camping!
Me, My wonderful Wife, 2 Bluetick Hounds, a Newfie, a Cairn Terrier & a Black Lab / Newfie Mix.
2018 Jayco Alante 31v