OK, After MUCH searching for the best source of these OEM festoon bulbs, here is where I ended up.
I needed to order several hundred dollars of repair parts, so I included 3 of these bulbs in my order to avoid the ~$10 S&H charges if just ordered separately.
Mobility R. V. Inc.www.winnwbagoparts.com
818 Hwy 9 East
PO Box 85
Hanlontown, IA 50444
Ask for Terry - he treated me with EXCELLENT care.
Here is the part info: 10835401700 Bulb/courtesy light price: $2.50
For your unit: (Winnebago, but will probably fit others)
On left, click on "Parts and Service Documentation",
Then, in the middle of page, click on "Parts Documentation",
Then click on your year, then Model, then No.,
Then your complete parts catalogue will come up.
My 2001 Winnebago Adventurer 32V Bulb is on page 126 under Electrical Group; Component Parts for Lights & Switches. ... around middle of page .. both the complete light assy as well as the replacement bulb are listed.
I have tries all of the auto parts stores, looked at lighting stores on the internet, etc., etc. and this is the best option that I have found.
These are the EXACT OEM parts...I just put the new bulb in the two spring tabs and now have light.
Hope this will help those who are still searching........the S&H is a little pricey but...............
Let us all know if this has been helpful to you.