Just last week I tried to order a set of the "LN W/ TIP MOUNT BOTH". They were no longer available, but my order taker thought there may be just one RIGHT MOUNT up on a shelf. It was , it was included I'm my order, and I received it two days ago. Now I just need the one for the left wingtip.
The info in the package states it came from:
Aero-Strategies Unlimited
521 Eagle Court SE
Mantorville, MN 55955 www.aerous.com
Google gives a phone number of 507 635 5976
I will be calling them later today to see if they can still provide the product.
A good friend of mine produced some for me that strobe and NAV both wingtips and tail. They are FANTASTIC.
www.flyleds.com is the web address and I can tell you I am very happy with them and they exceed aviation lighting requirements by a significant margin and are designed to just fit into RV wingtips.
Have a look and feel free to drop me an email to discuss.